diff --git a/invokeai/frontend/web/public/locales/en.json b/invokeai/frontend/web/public/locales/en.json
index b403fde2c6..6734f1dcd1 100644
--- a/invokeai/frontend/web/public/locales/en.json
+++ b/invokeai/frontend/web/public/locales/en.json
@@ -528,7 +528,8 @@
         "hidePreview": "Hide Preview",
         "showPreview": "Show Preview",
         "controlNetControlMode": "Control Mode",
-        "clipSkip": "Clip Skip"
+        "clipSkip": "Clip Skip",
+        "aspectRatio": "Ratio"
     },
     "settings": {
         "models": "Models",
@@ -671,6 +672,7 @@
     },
     "ui": {
         "showProgressImages": "Show Progress Images",
-        "hideProgressImages": "Hide Progress Images"
+        "hideProgressImages": "Hide Progress Images",
+        "swapSizes": "Swap Sizes"
     }
 }
diff --git a/invokeai/frontend/web/src/features/parameters/components/Parameters/Core/ParamAspectRatio.tsx b/invokeai/frontend/web/src/features/parameters/components/Parameters/Core/ParamAspectRatio.tsx
new file mode 100644
index 0000000000..0a568fb84d
--- /dev/null
+++ b/invokeai/frontend/web/src/features/parameters/components/Parameters/Core/ParamAspectRatio.tsx
@@ -0,0 +1,37 @@
+import { ButtonGroup, Flex } from '@chakra-ui/react';
+import { RootState } from 'app/store/store';
+import { useAppDispatch, useAppSelector } from 'app/store/storeHooks';
+import IAIButton from 'common/components/IAIButton';
+import { setAspectRatio } from 'features/ui/store/uiSlice';
+
+const aspectRatios = [
+  { name: 'Free', value: null },
+  { name: 'Portrait', value: 0.67 / 1 },
+  { name: 'Wide', value: 16 / 9 },
+  { name: 'Square', value: 1 / 1 },
+];
+
+export default function ParamAspectRatio() {
+  const aspectRatio = useAppSelector(
+    (state: RootState) => state.ui.aspectRatio
+  );
+
+  const dispatch = useAppDispatch();
+
+  return (
+    <Flex gap={2} flexGrow={1}>
+      <ButtonGroup isAttached>
+        {aspectRatios.map((ratio) => (
+          <IAIButton
+            key={ratio.name}
+            size="sm"
+            isChecked={aspectRatio === ratio.value}
+            onClick={() => dispatch(setAspectRatio(ratio.value))}
+          >
+            {ratio.name}
+          </IAIButton>
+        ))}
+      </ButtonGroup>
+    </Flex>
+  );
+}
diff --git a/invokeai/frontend/web/src/features/parameters/components/Parameters/Core/ParamHeight.tsx b/invokeai/frontend/web/src/features/parameters/components/Parameters/Core/ParamHeight.tsx
index 6939ede424..63abe0ddf9 100644
--- a/invokeai/frontend/web/src/features/parameters/components/Parameters/Core/ParamHeight.tsx
+++ b/invokeai/frontend/web/src/features/parameters/components/Parameters/Core/ParamHeight.tsx
@@ -2,19 +2,22 @@ import { createSelector } from '@reduxjs/toolkit';
 import { useAppDispatch, useAppSelector } from 'app/store/storeHooks';
 import { defaultSelectorOptions } from 'app/store/util/defaultMemoizeOptions';
 import IAISlider, { IAIFullSliderProps } from 'common/components/IAISlider';
+import { roundToMultiple } from 'common/util/roundDownToMultiple';
 import { generationSelector } from 'features/parameters/store/generationSelectors';
-import { setHeight } from 'features/parameters/store/generationSlice';
+import { setHeight, setWidth } from 'features/parameters/store/generationSlice';
 import { configSelector } from 'features/system/store/configSelectors';
 import { hotkeysSelector } from 'features/ui/store/hotkeysSlice';
+import { uiSelector } from 'features/ui/store/uiSelectors';
 import { memo, useCallback } from 'react';
 import { useTranslation } from 'react-i18next';
 
 const selector = createSelector(
-  [generationSelector, hotkeysSelector, configSelector],
-  (generation, hotkeys, config) => {
+  [generationSelector, hotkeysSelector, configSelector, uiSelector],
+  (generation, hotkeys, config, ui) => {
     const { initial, min, sliderMax, inputMax, fineStep, coarseStep } =
       config.sd.height;
     const { height } = generation;
+    const { aspectRatio } = ui;
 
     const step = hotkeys.shift ? fineStep : coarseStep;
 
@@ -25,6 +28,7 @@ const selector = createSelector(
       sliderMax,
       inputMax,
       step,
+      aspectRatio,
     };
   },
   defaultSelectorOptions
@@ -36,7 +40,7 @@ type ParamHeightProps = Omit<
 >;
 
 const ParamHeight = (props: ParamHeightProps) => {
-  const { height, initial, min, sliderMax, inputMax, step } =
+  const { height, initial, min, sliderMax, inputMax, step, aspectRatio } =
     useAppSelector(selector);
   const dispatch = useAppDispatch();
   const { t } = useTranslation();
@@ -44,13 +48,21 @@ const ParamHeight = (props: ParamHeightProps) => {
   const handleChange = useCallback(
     (v: number) => {
       dispatch(setHeight(v));
+      if (aspectRatio) {
+        const newWidth = roundToMultiple(v * aspectRatio, 8);
+        dispatch(setWidth(newWidth));
+      }
     },
-    [dispatch]
+    [dispatch, aspectRatio]
   );
 
   const handleReset = useCallback(() => {
     dispatch(setHeight(initial));
-  }, [dispatch, initial]);
+    if (aspectRatio) {
+      const newWidth = roundToMultiple(initial * aspectRatio, 8);
+      dispatch(setWidth(newWidth));
+    }
+  }, [dispatch, initial, aspectRatio]);
 
   return (
     <IAISlider
diff --git a/invokeai/frontend/web/src/features/parameters/components/Parameters/Core/ParamSize.tsx b/invokeai/frontend/web/src/features/parameters/components/Parameters/Core/ParamSize.tsx
new file mode 100644
index 0000000000..496431ff3d
--- /dev/null
+++ b/invokeai/frontend/web/src/features/parameters/components/Parameters/Core/ParamSize.tsx
@@ -0,0 +1,64 @@
+import { Flex, Spacer, Text } from '@chakra-ui/react';
+import { RootState } from 'app/store/store';
+import { useAppDispatch, useAppSelector } from 'app/store/storeHooks';
+import IAIIconButton from 'common/components/IAIIconButton';
+import { toggleSize } from 'features/parameters/store/generationSlice';
+import { useTranslation } from 'react-i18next';
+import { MdOutlineSwapVert } from 'react-icons/md';
+import ParamAspectRatio from './ParamAspectRatio';
+import ParamHeight from './ParamHeight';
+import ParamWidth from './ParamWidth';
+
+export default function ParamSize() {
+  const { t } = useTranslation();
+  const dispatch = useAppDispatch();
+  const shouldFitToWidthHeight = useAppSelector(
+    (state: RootState) => state.generation.shouldFitToWidthHeight
+  );
+  return (
+    <Flex
+      sx={{
+        gap: 2,
+        p: 4,
+        borderRadius: 4,
+        flexDirection: 'column',
+        w: 'full',
+        bg: 'base.150',
+        _dark: {
+          bg: 'base.750',
+        },
+      }}
+    >
+      <Flex alignItems="center" gap={2}>
+        <Text
+          sx={{
+            fontSize: 'sm',
+            width: 'full',
+            color: 'base.700',
+            _dark: {
+              color: 'base.300',
+            },
+          }}
+        >
+          {t('parameters.aspectRatio')}
+        </Text>
+        <Spacer />
+        <ParamAspectRatio />
+        <IAIIconButton
+          tooltip={t('ui.swapSizes')}
+          aria-label={t('ui.swapSizes')}
+          size="sm"
+          icon={<MdOutlineSwapVert />}
+          fontSize={20}
+          onClick={() => dispatch(toggleSize())}
+        />
+      </Flex>
+      <Flex gap={2} alignItems="center">
+        <Flex gap={2} flexDirection="column" width="full">
+          <ParamWidth isDisabled={!shouldFitToWidthHeight} />
+          <ParamHeight isDisabled={!shouldFitToWidthHeight} />
+        </Flex>
+      </Flex>
+    </Flex>
+  );
+}
diff --git a/invokeai/frontend/web/src/features/parameters/components/Parameters/Core/ParamWidth.tsx b/invokeai/frontend/web/src/features/parameters/components/Parameters/Core/ParamWidth.tsx
index b4121184b5..991db19097 100644
--- a/invokeai/frontend/web/src/features/parameters/components/Parameters/Core/ParamWidth.tsx
+++ b/invokeai/frontend/web/src/features/parameters/components/Parameters/Core/ParamWidth.tsx
@@ -2,19 +2,22 @@ import { createSelector } from '@reduxjs/toolkit';
 import { useAppDispatch, useAppSelector } from 'app/store/storeHooks';
 import { defaultSelectorOptions } from 'app/store/util/defaultMemoizeOptions';
 import IAISlider, { IAIFullSliderProps } from 'common/components/IAISlider';
+import { roundToMultiple } from 'common/util/roundDownToMultiple';
 import { generationSelector } from 'features/parameters/store/generationSelectors';
-import { setWidth } from 'features/parameters/store/generationSlice';
+import { setHeight, setWidth } from 'features/parameters/store/generationSlice';
 import { configSelector } from 'features/system/store/configSelectors';
 import { hotkeysSelector } from 'features/ui/store/hotkeysSlice';
+import { uiSelector } from 'features/ui/store/uiSelectors';
 import { memo, useCallback } from 'react';
 import { useTranslation } from 'react-i18next';
 
 const selector = createSelector(
-  [generationSelector, hotkeysSelector, configSelector],
-  (generation, hotkeys, config) => {
+  [generationSelector, hotkeysSelector, configSelector, uiSelector],
+  (generation, hotkeys, config, ui) => {
     const { initial, min, sliderMax, inputMax, fineStep, coarseStep } =
       config.sd.width;
     const { width } = generation;
+    const { aspectRatio } = ui;
 
     const step = hotkeys.shift ? fineStep : coarseStep;
 
@@ -25,6 +28,7 @@ const selector = createSelector(
       sliderMax,
       inputMax,
       step,
+      aspectRatio,
     };
   },
   defaultSelectorOptions
@@ -33,7 +37,7 @@ const selector = createSelector(
 type ParamWidthProps = Omit<IAIFullSliderProps, 'label' | 'value' | 'onChange'>;
 
 const ParamWidth = (props: ParamWidthProps) => {
-  const { width, initial, min, sliderMax, inputMax, step } =
+  const { width, initial, min, sliderMax, inputMax, step, aspectRatio } =
     useAppSelector(selector);
   const dispatch = useAppDispatch();
   const { t } = useTranslation();
@@ -41,13 +45,21 @@ const ParamWidth = (props: ParamWidthProps) => {
   const handleChange = useCallback(
     (v: number) => {
       dispatch(setWidth(v));
+      if (aspectRatio) {
+        const newHeight = roundToMultiple(v / aspectRatio, 8);
+        dispatch(setHeight(newHeight));
+      }
     },
-    [dispatch]
+    [dispatch, aspectRatio]
   );
 
   const handleReset = useCallback(() => {
     dispatch(setWidth(initial));
-  }, [dispatch, initial]);
+    if (aspectRatio) {
+      const newHeight = roundToMultiple(initial / aspectRatio, 8);
+      dispatch(setHeight(newHeight));
+    }
+  }, [dispatch, initial, aspectRatio]);
 
   return (
     <IAISlider
diff --git a/invokeai/frontend/web/src/features/parameters/store/generationSlice.ts b/invokeai/frontend/web/src/features/parameters/store/generationSlice.ts
index 867eb6ed07..56728f216f 100644
--- a/invokeai/frontend/web/src/features/parameters/store/generationSlice.ts
+++ b/invokeai/frontend/web/src/features/parameters/store/generationSlice.ts
@@ -1,8 +1,12 @@
 import type { PayloadAction } from '@reduxjs/toolkit';
 import { createSlice } from '@reduxjs/toolkit';
 import { DEFAULT_SCHEDULER_NAME } from 'app/constants';
+import { roundToMultiple } from 'common/util/roundDownToMultiple';
 import { configChanged } from 'features/system/store/configSlice';
-import { setShouldShowAdvancedOptions } from 'features/ui/store/uiSlice';
+import {
+  setAspectRatio,
+  setShouldShowAdvancedOptions,
+} from 'features/ui/store/uiSlice';
 import { clamp } from 'lodash-es';
 import { ImageDTO } from 'services/api/types';
 import { clipSkipMap } from '../components/Parameters/Advanced/ParamClipSkip';
@@ -139,6 +143,11 @@ export const generationSlice = createSlice({
     setWidth: (state, action: PayloadAction<number>) => {
       state.width = action.payload;
     },
+    toggleSize: (state) => {
+      const [width, height] = [state.width, state.height];
+      state.width = height;
+      state.height = width;
+    },
     setScheduler: (state, action: PayloadAction<SchedulerParam>) => {
       state.scheduler = action.payload;
     },
@@ -262,6 +271,12 @@ export const generationSlice = createSlice({
       const advancedOptionsStatus = action.payload;
       if (!advancedOptionsStatus) state.clipSkip = 0;
     });
+    builder.addCase(setAspectRatio, (state, action) => {
+      const ratio = action.payload;
+      if (ratio) {
+        state.height = roundToMultiple(state.width / ratio, 8);
+      }
+    });
   },
 });
 
@@ -271,7 +286,9 @@ export const {
   resetParametersState,
   resetSeed,
   setCfgScale,
+  setWidth,
   setHeight,
+  toggleSize,
   setImg2imgStrength,
   setInfillMethod,
   setIterations,
@@ -292,7 +309,6 @@ export const {
   setThreshold,
   setTileSize,
   setVariationAmount,
-  setWidth,
   setShouldUseSymmetry,
   setHorizontalSymmetrySteps,
   setVerticalSymmetrySteps,
diff --git a/invokeai/frontend/web/src/features/ui/components/tabs/ImageToImage/ImageToImageTabCoreParameters.tsx b/invokeai/frontend/web/src/features/ui/components/tabs/ImageToImage/ImageToImageTabCoreParameters.tsx
index b333a0caf2..cda908da50 100644
--- a/invokeai/frontend/web/src/features/ui/components/tabs/ImageToImage/ImageToImageTabCoreParameters.tsx
+++ b/invokeai/frontend/web/src/features/ui/components/tabs/ImageToImage/ImageToImageTabCoreParameters.tsx
@@ -4,11 +4,10 @@ import { useAppSelector } from 'app/store/storeHooks';
 import { defaultSelectorOptions } from 'app/store/util/defaultMemoizeOptions';
 import IAICollapse from 'common/components/IAICollapse';
 import ParamCFGScale from 'features/parameters/components/Parameters/Core/ParamCFGScale';
-import ParamHeight from 'features/parameters/components/Parameters/Core/ParamHeight';
 import ParamIterations from 'features/parameters/components/Parameters/Core/ParamIterations';
 import ParamModelandVAEandScheduler from 'features/parameters/components/Parameters/Core/ParamModelandVAEandScheduler';
+import ParamSize from 'features/parameters/components/Parameters/Core/ParamSize';
 import ParamSteps from 'features/parameters/components/Parameters/Core/ParamSteps';
-import ParamWidth from 'features/parameters/components/Parameters/Core/ParamWidth';
 import ImageToImageFit from 'features/parameters/components/Parameters/ImageToImage/ImageToImageFit';
 import ImageToImageStrength from 'features/parameters/components/Parameters/ImageToImage/ImageToImageStrength';
 import ParamSeedFull from 'features/parameters/components/Parameters/Seed/ParamSeedFull';
@@ -47,15 +46,14 @@ const ImageToImageTabCoreParameters = () => {
       >
         {shouldUseSliders ? (
           <>
+            <ParamIterations />
+            <ParamSteps />
+            <ParamCFGScale />
             <ParamModelandVAEandScheduler />
             <Box pt={2}>
               <ParamSeedFull />
             </Box>
-            <ParamIterations />
-            <ParamSteps />
-            <ParamCFGScale />
-            <ParamWidth isDisabled={!shouldFitToWidthHeight} />
-            <ParamHeight isDisabled={!shouldFitToWidthHeight} />
+            <ParamSize />
           </>
         ) : (
           <>
@@ -68,8 +66,7 @@ const ImageToImageTabCoreParameters = () => {
             <Box pt={2}>
               <ParamSeedFull />
             </Box>
-            <ParamWidth isDisabled={!shouldFitToWidthHeight} />
-            <ParamHeight isDisabled={!shouldFitToWidthHeight} />
+            <ParamSize />
           </>
         )}
         <ImageToImageStrength />
diff --git a/invokeai/frontend/web/src/features/ui/components/tabs/TextToImage/TextToImageTabCoreParameters.tsx b/invokeai/frontend/web/src/features/ui/components/tabs/TextToImage/TextToImageTabCoreParameters.tsx
index b007497db2..de8f64e661 100644
--- a/invokeai/frontend/web/src/features/ui/components/tabs/TextToImage/TextToImageTabCoreParameters.tsx
+++ b/invokeai/frontend/web/src/features/ui/components/tabs/TextToImage/TextToImageTabCoreParameters.tsx
@@ -5,11 +5,10 @@ import { useAppSelector } from 'app/store/storeHooks';
 import { defaultSelectorOptions } from 'app/store/util/defaultMemoizeOptions';
 import IAICollapse from 'common/components/IAICollapse';
 import ParamCFGScale from 'features/parameters/components/Parameters/Core/ParamCFGScale';
-import ParamHeight from 'features/parameters/components/Parameters/Core/ParamHeight';
 import ParamIterations from 'features/parameters/components/Parameters/Core/ParamIterations';
 import ParamModelandVAEandScheduler from 'features/parameters/components/Parameters/Core/ParamModelandVAEandScheduler';
+import ParamSize from 'features/parameters/components/Parameters/Core/ParamSize';
 import ParamSteps from 'features/parameters/components/Parameters/Core/ParamSteps';
-import ParamWidth from 'features/parameters/components/Parameters/Core/ParamWidth';
 import ParamSeedFull from 'features/parameters/components/Parameters/Seed/ParamSeedFull';
 import { memo } from 'react';
 
@@ -43,15 +42,14 @@ const TextToImageTabCoreParameters = () => {
       >
         {shouldUseSliders ? (
           <>
+            <ParamIterations />
+            <ParamSteps />
+            <ParamCFGScale />
             <ParamModelandVAEandScheduler />
             <Box pt={2}>
               <ParamSeedFull />
             </Box>
-            <ParamIterations />
-            <ParamSteps />
-            <ParamCFGScale />
-            <ParamWidth />
-            <ParamHeight />
+            <ParamSize />
           </>
         ) : (
           <>
@@ -64,8 +62,7 @@ const TextToImageTabCoreParameters = () => {
             <Box pt={2}>
               <ParamSeedFull />
             </Box>
-            <ParamWidth />
-            <ParamHeight />
+            <ParamSize />
           </>
         )}
       </Flex>
diff --git a/invokeai/frontend/web/src/features/ui/components/tabs/UnifiedCanvas/UnifiedCanvasCoreParameters.tsx b/invokeai/frontend/web/src/features/ui/components/tabs/UnifiedCanvas/UnifiedCanvasCoreParameters.tsx
index ecce61c218..6ea9d4bc8d 100644
--- a/invokeai/frontend/web/src/features/ui/components/tabs/UnifiedCanvas/UnifiedCanvasCoreParameters.tsx
+++ b/invokeai/frontend/web/src/features/ui/components/tabs/UnifiedCanvas/UnifiedCanvasCoreParameters.tsx
@@ -44,13 +44,13 @@ const UnifiedCanvasCoreParameters = () => {
       >
         {shouldUseSliders ? (
           <>
+            <ParamIterations />
+            <ParamSteps />
+            <ParamCFGScale />
             <ParamModelandVAEandScheduler />
             <Box pt={2}>
               <ParamSeedFull />
             </Box>
-            <ParamIterations />
-            <ParamSteps />
-            <ParamCFGScale />
             <ParamBoundingBoxWidth />
             <ParamBoundingBoxHeight />
           </>
diff --git a/invokeai/frontend/web/src/features/ui/store/uiSlice.ts b/invokeai/frontend/web/src/features/ui/store/uiSlice.ts
index 04fee42126..4f38f84fe2 100644
--- a/invokeai/frontend/web/src/features/ui/store/uiSlice.ts
+++ b/invokeai/frontend/web/src/features/ui/store/uiSlice.ts
@@ -21,6 +21,7 @@ export const initialUIState: UIState = {
   shouldShowProgressInViewer: true,
   shouldShowEmbeddingPicker: false,
   shouldShowAdvancedOptions: false,
+  aspectRatio: null,
   favoriteSchedulers: [],
 };
 
@@ -104,6 +105,9 @@ export const uiSlice = createSlice({
     setShouldShowAdvancedOptions: (state, action: PayloadAction<boolean>) => {
       state.shouldShowAdvancedOptions = action.payload;
     },
+    setAspectRatio: (state, action: PayloadAction<number | null>) => {
+      state.aspectRatio = action.payload;
+    },
   },
   extraReducers(builder) {
     builder.addCase(initialImageChanged, (state) => {
@@ -132,6 +136,7 @@ export const {
   favoriteSchedulersChanged,
   toggleEmbeddingPicker,
   setShouldShowAdvancedOptions,
+  setAspectRatio,
 } = uiSlice.actions;
 
 export default uiSlice.reducer;
diff --git a/invokeai/frontend/web/src/features/ui/store/uiTypes.ts b/invokeai/frontend/web/src/features/ui/store/uiTypes.ts
index 2356446030..e574f0ab79 100644
--- a/invokeai/frontend/web/src/features/ui/store/uiTypes.ts
+++ b/invokeai/frontend/web/src/features/ui/store/uiTypes.ts
@@ -29,5 +29,6 @@ export interface UIState {
   shouldShowProgressInViewer: boolean;
   shouldShowEmbeddingPicker: boolean;
   shouldShowAdvancedOptions: boolean;
+  aspectRatio: number | null;
   favoriteSchedulers: SchedulerParam[];
 }