diff --git a/.eslintrc.js b/.eslintrc.js
index eb2d2db47e4cab..0ee92a10b88afc 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -323,13 +323,15 @@ module.exports = {
 							' should have the `__next40pxDefaultSize` prop to opt-in to the new default size.',
 					} ) ),
 					// Temporary rules until all existing components have the `__next40pxDefaultSize` prop.
-					...[ 'TextControl' ].map( ( componentName ) => ( {
-						// Not strict. Allows pre-existing __next40pxDefaultSize={ false } usage until they are all manually updated.
-						selector: `JSXOpeningElement[name.name="${ componentName }"]:not(:has(JSXAttribute[name.name="__next40pxDefaultSize"])):not(:has(JSXAttribute[name.name="size"]))`,
-						message:
-							componentName +
-							' should have the `__next40pxDefaultSize` prop to opt-in to the new default size.',
-					} ) ),
+					...[ 'SelectControl', 'TextControl' ].map(
+						( componentName ) => ( {
+							// Not strict. Allows pre-existing __next40pxDefaultSize={ false } usage until they are all manually updated.
+							selector: `JSXOpeningElement[name.name="${ componentName }"]:not(:has(JSXAttribute[name.name="__next40pxDefaultSize"])):not(:has(JSXAttribute[name.name="size"]))`,
+							message:
+								componentName +
+								' should have the `__next40pxDefaultSize` prop to opt-in to the new default size.',
+						} )
+					),
 				],
 			},
 		},
diff --git a/packages/block-editor/src/components/font-family/README.md b/packages/block-editor/src/components/font-family/README.md
index 6b37459fd127e7..63965f509ba534 100644
--- a/packages/block-editor/src/components/font-family/README.md
+++ b/packages/block-editor/src/components/font-family/README.md
@@ -71,9 +71,18 @@ The current font family value.
 
 The rest of the props are passed down to the underlying `<SelectControl />` instance.
 
+#### `__next40pxDefaultSize`
+
+- Type: `boolean`
+- Required: No
+- Default: `false`
+
+Start opting into the larger default height that will become the default size in a future version.
+
 #### `__nextHasNoMarginBottom`
 
--   **Type:** `boolean`
--   **Default:** `false`
+- Type: `boolean`
+- Required: No
+- Default: `false`
 
 Start opting into the new margin-free styles that will become the default in a future version.
diff --git a/packages/block-editor/src/components/font-family/index.js b/packages/block-editor/src/components/font-family/index.js
index 90a0412463b3ef..c87a52b4c676d2 100644
--- a/packages/block-editor/src/components/font-family/index.js
+++ b/packages/block-editor/src/components/font-family/index.js
@@ -11,6 +11,8 @@ import { __ } from '@wordpress/i18n';
 import { useSettings } from '../use-settings';
 
 export default function FontFamilyControl( {
+	/** Start opting into the larger default height that will become the default size in a future version. */
+	__next40pxDefaultSize = false,
 	/** Start opting into the new margin-free styles that will become the default in a future version. */
 	__nextHasNoMarginBottom = false,
 	value = '',
@@ -50,6 +52,7 @@ export default function FontFamilyControl( {
 
 	return (
 		<SelectControl
+			__next40pxDefaultSize={ __next40pxDefaultSize }
 			__nextHasNoMarginBottom={ __nextHasNoMarginBottom }
 			label={ __( 'Font' ) }
 			options={ options }
diff --git a/packages/block-editor/src/components/responsive-block-control/test/index.js b/packages/block-editor/src/components/responsive-block-control/test/index.js
index 57944b591108d7..ef32c60722f541 100644
--- a/packages/block-editor/src/components/responsive-block-control/test/index.js
+++ b/packages/block-editor/src/components/responsive-block-control/test/index.js
@@ -40,6 +40,7 @@ const renderTestDefaultControlComponent = ( labelComponent, device ) => {
 	return (
 		<>
 			<SelectControl
+				__next40pxDefaultSize
 				label={ labelComponent }
 				options={ sizeOptions }
 				__nextHasNoMarginBottom
diff --git a/packages/block-library/src/archives/edit.js b/packages/block-library/src/archives/edit.js
index 4eed206314e427..ee9bf60fb77ec0 100644
--- a/packages/block-library/src/archives/edit.js
+++ b/packages/block-library/src/archives/edit.js
@@ -51,6 +51,7 @@ export default function ArchivesEdit( { attributes, setAttributes } ) {
 						}
 					/>
 					<SelectControl
+						__next40pxDefaultSize
 						__nextHasNoMarginBottom
 						label={ __( 'Group by:' ) }
 						options={ [
diff --git a/packages/block-library/src/audio/edit.js b/packages/block-library/src/audio/edit.js
index 97d3c9c5a1ae3f..3c9f9e11c3b24b 100644
--- a/packages/block-library/src/audio/edit.js
+++ b/packages/block-library/src/audio/edit.js
@@ -174,6 +174,7 @@ function AudioEdit( {
 						checked={ loop }
 					/>
 					<SelectControl
+						__next40pxDefaultSize
 						__nextHasNoMarginBottom
 						label={ _x( 'Preload', 'noun; Audio block parameter' ) }
 						value={ preload || '' }
@@ -197,9 +198,9 @@ function AudioEdit( {
 			</InspectorControls>
 			<figure { ...blockProps }>
 				{ /*
-					Disable the audio tag if the block is not selected
-					so the user clicking on it won't play the
-					file or change the position slider when the controls are enabled.
+				Disable the audio tag if the block is not selected
+				so the user clicking on it won't play the
+				file or change the position slider when the controls are enabled.
 				*/ }
 				<Disabled isDisabled={ ! isSingleSelected }>
 					<audio controls="controls" src={ src ?? temporaryURL } />
diff --git a/packages/block-library/src/file/inspector.js b/packages/block-library/src/file/inspector.js
index 76ed28d124600e..c29f84f60ebace 100644
--- a/packages/block-library/src/file/inspector.js
+++ b/packages/block-library/src/file/inspector.js
@@ -73,6 +73,7 @@ export default function FileBlockInspector( {
 				) }
 				<PanelBody title={ __( 'Settings' ) }>
 					<SelectControl
+						__next40pxDefaultSize
 						__nextHasNoMarginBottom
 						label={ __( 'Link to' ) }
 						value={ textLinkHref }
diff --git a/packages/block-library/src/form/edit.js b/packages/block-library/src/form/edit.js
index d6f9d80f155c38..6a30dd0b61bf9d 100644
--- a/packages/block-library/src/form/edit.js
+++ b/packages/block-library/src/form/edit.js
@@ -130,6 +130,8 @@ const Edit = ( { attributes, setAttributes, clientId } ) => {
 			{ submissionMethod !== 'email' && (
 				<InspectorControls group="advanced">
 					<SelectControl
+						// TODO: Switch to `true` (40px size) if possible
+						__next40pxDefaultSize={ false }
 						__nextHasNoMarginBottom
 						label={ __( 'Method' ) }
 						options={ [
diff --git a/packages/block-library/src/post-author/edit.js b/packages/block-library/src/post-author/edit.js
index dfe0a001d2ee59..1bc1ef4ffcd8a3 100644
--- a/packages/block-library/src/post-author/edit.js
+++ b/packages/block-library/src/post-author/edit.js
@@ -112,6 +112,7 @@ function PostAuthorEdit( {
 							/>
 						) ) || (
 							<SelectControl
+								__next40pxDefaultSize
 								__nextHasNoMarginBottom
 								label={ __( 'Author' ) }
 								value={ authorId }
@@ -129,6 +130,7 @@ function PostAuthorEdit( {
 					/>
 					{ showAvatar && (
 						<SelectControl
+							__next40pxDefaultSize
 							__nextHasNoMarginBottom
 							label={ __( 'Avatar size' ) }
 							value={ attributes.avatarSize }
diff --git a/packages/block-library/src/post-featured-image/dimension-controls.js b/packages/block-library/src/post-featured-image/dimension-controls.js
index c8e8c0005cfef5..97b2cd738c3e10 100644
--- a/packages/block-library/src/post-featured-image/dimension-controls.js
+++ b/packages/block-library/src/post-featured-image/dimension-controls.js
@@ -134,6 +134,8 @@ const DimensionControls = ( {
 				panelId={ clientId }
 			>
 				<SelectControl
+					// TODO: Switch to `true` (40px size) if possible
+					__next40pxDefaultSize={ false }
 					__nextHasNoMarginBottom
 					label={ __( 'Aspect ratio' ) }
 					value={ aspectRatio }
@@ -232,6 +234,8 @@ const DimensionControls = ( {
 					panelId={ clientId }
 				>
 					<SelectControl
+						// TODO: Switch to `true` (40px size) if possible
+						__next40pxDefaultSize={ false }
 						__nextHasNoMarginBottom
 						label={ __( 'Resolution' ) }
 						value={ sizeSlug || DEFAULT_SIZE }
diff --git a/packages/block-library/src/template-part/edit/advanced-controls.js b/packages/block-library/src/template-part/edit/advanced-controls.js
index 79a3a158b87ea0..bf834065d1a54b 100644
--- a/packages/block-library/src/template-part/edit/advanced-controls.js
+++ b/packages/block-library/src/template-part/edit/advanced-controls.js
@@ -85,6 +85,8 @@ export function TemplatePartAdvancedControls( {
 					/>
 
 					<SelectControl
+						// TODO: Switch to `true` (40px size) if possible
+						__next40pxDefaultSize={ false }
 						__nextHasNoMarginBottom
 						label={ __( 'Area' ) }
 						labelPosition="top"
diff --git a/packages/block-library/src/video/tracks-editor.js b/packages/block-library/src/video/tracks-editor.js
index 3864722c7a7794..521d54e9231d1b 100644
--- a/packages/block-library/src/video/tracks-editor.js
+++ b/packages/block-library/src/video/tracks-editor.js
@@ -132,6 +132,8 @@ function SingleTrackEditor( { track, onChange, onClose, onRemove } ) {
 				</Grid>
 				<VStack spacing="8">
 					<SelectControl
+						// TODO: Switch to `true` (40px size) if possible
+						__next40pxDefaultSize={ false }
 						__nextHasNoMarginBottom
 						className="block-library-video-tracks-editor__single-track-editor-kind-select"
 						options={ KIND_OPTIONS }
diff --git a/packages/widgets/src/blocks/legacy-widget/edit/widget-type-selector.js b/packages/widgets/src/blocks/legacy-widget/edit/widget-type-selector.js
index 215e2d2447c3c9..cc7c0830a319bf 100644
--- a/packages/widgets/src/blocks/legacy-widget/edit/widget-type-selector.js
+++ b/packages/widgets/src/blocks/legacy-widget/edit/widget-type-selector.js
@@ -27,6 +27,8 @@ export default function WidgetTypeSelector( { selectedId, onSelect } ) {
 
 	return (
 		<SelectControl
+			// TODO: Switch to `true` (40px size) if possible
+			__next40pxDefaultSize={ false }
 			__nextHasNoMarginBottom
 			label={ __( 'Select a legacy widget to display:' ) }
 			value={ selectedId ?? '' }