diff --git a/packages/edit-site/src/components/global-styles/font-library-modal/installed-fonts.js b/packages/edit-site/src/components/global-styles/font-library-modal/installed-fonts.js
index fd962618b510a..c644c219348a6 100644
--- a/packages/edit-site/src/components/global-styles/font-library-modal/installed-fonts.js
+++ b/packages/edit-site/src/components/global-styles/font-library-modal/installed-fonts.js
@@ -382,6 +382,7 @@ function ConfirmDeleteDialog( {
 			confirmButtonText={ __( 'Delete' ) }
 			onCancel={ handleCancelUninstall }
 			onConfirm={ handleConfirmUninstall }
+			size="medium"
 		>
 			{ font &&
 				sprintf(
diff --git a/packages/edit-site/src/components/global-styles/screen-revisions/index.js b/packages/edit-site/src/components/global-styles/screen-revisions/index.js
index dab5c77176bfd..de27e92113b55 100644
--- a/packages/edit-site/src/components/global-styles/screen-revisions/index.js
+++ b/packages/edit-site/src/components/global-styles/screen-revisions/index.js
@@ -198,6 +198,7 @@ function ScreenRevisions() {
 					onCancel={ () =>
 						setIsLoadingRevisionWithUnsavedChanges( false )
 					}
+					size="medium"
 				>
 					{ __(
 						'Are you sure you want to apply this revision? Any unsaved changes will be lost.'
diff --git a/packages/edit-site/src/components/global-styles/shadows-edit-panel.js b/packages/edit-site/src/components/global-styles/shadows-edit-panel.js
index 443d72deb9573..7a513cc250d66 100644
--- a/packages/edit-site/src/components/global-styles/shadows-edit-panel.js
+++ b/packages/edit-site/src/components/global-styles/shadows-edit-panel.js
@@ -201,6 +201,7 @@ export default function ShadowsEditPanel() {
 						setIsConfirmDialogVisible( false );
 					} }
 					confirmButtonText={ __( 'Delete' ) }
+					size="medium"
 				>
 					{ sprintf(
 						// translators: %s: name of the shadow
diff --git a/packages/edit-site/src/components/sidebar-navigation-screen-navigation-menu/delete-confirm-dialog.js b/packages/edit-site/src/components/sidebar-navigation-screen-navigation-menu/delete-confirm-dialog.js
index fdfb189fd3cd1..ef1fd11612cca 100644
--- a/packages/edit-site/src/components/sidebar-navigation-screen-navigation-menu/delete-confirm-dialog.js
+++ b/packages/edit-site/src/components/sidebar-navigation-screen-navigation-menu/delete-confirm-dialog.js
@@ -16,6 +16,7 @@ export default function DeleteConfirmDialog( { onClose, onConfirm } ) {
 			} }
 			onCancel={ onClose }
 			confirmButtonText={ __( 'Delete' ) }
+			size="medium"
 		>
 			{ __( 'Are you sure you want to delete this Navigation Menu?' ) }
 		</ConfirmDialog>
diff --git a/packages/editor/src/components/post-trash/index.js b/packages/editor/src/components/post-trash/index.js
index ebb078804da6d..15efcf190b687 100644
--- a/packages/editor/src/components/post-trash/index.js
+++ b/packages/editor/src/components/post-trash/index.js
@@ -55,6 +55,7 @@ export default function PostTrash() {
 				onConfirm={ handleConfirm }
 				onCancel={ () => setShowConfirmDialog( false ) }
 				confirmButtonText={ __( 'Move to trash' ) }
+				size="medium"
 			>
 				{ __(
 					'Are you sure you want to move this post to the trash?'
diff --git a/packages/editor/src/components/post-visibility/index.js b/packages/editor/src/components/post-visibility/index.js
index fef07d0033d36..e47f2acd66443 100644
--- a/packages/editor/src/components/post-visibility/index.js
+++ b/packages/editor/src/components/post-visibility/index.js
@@ -133,6 +133,7 @@ export default function PostVisibility( { onClose } ) {
 				onConfirm={ confirmPrivate }
 				onCancel={ handleDialogCancel }
 				confirmButtonText={ __( 'Publish' ) }
+				size="medium"
 			>
 				{ __( 'Would you like to privately publish this post now?' ) }
 			</ConfirmDialog>
diff --git a/packages/editor/src/components/template-validation-notice/index.js b/packages/editor/src/components/template-validation-notice/index.js
index 4aa1faac4bd9c..bfbc6319ffa8a 100644
--- a/packages/editor/src/components/template-validation-notice/index.js
+++ b/packages/editor/src/components/template-validation-notice/index.js
@@ -51,6 +51,7 @@ export default function TemplateValidationNotice() {
 					synchronizeTemplate();
 				} }
 				onCancel={ () => setShowConfirmDialog( false ) }
+				size="medium"
 			>
 				{ __(
 					'Resetting the template may result in loss of content, do you want to continue?'
diff --git a/packages/editor/src/components/visual-editor/edit-template-blocks-notification.js b/packages/editor/src/components/visual-editor/edit-template-blocks-notification.js
index ed96cae1c753e..775ef0f521363 100644
--- a/packages/editor/src/components/visual-editor/edit-template-blocks-notification.js
+++ b/packages/editor/src/components/visual-editor/edit-template-blocks-notification.js
@@ -80,6 +80,7 @@ export default function EditTemplateBlocksNotification( { contentRef } ) {
 				} );
 			} }
 			onCancel={ () => setIsDialogOpen( false ) }
+			size="medium"
 		>
 			{ __(
 				'You’ve tried to select a block that is part of a template, which may be used on other posts and pages. Would you like to edit the template?'