diff --git a/packages/block-library/src/gallery/edit.js b/packages/block-library/src/gallery/edit.js
index 31b4543cd9d4c4..7ab1b1307056f5 100644
--- a/packages/block-library/src/gallery/edit.js
+++ b/packages/block-library/src/gallery/edit.js
@@ -592,7 +592,7 @@ function GalleryEdit( props ) {
 							__nextHasNoMarginBottom
 							label={ __( 'Image size' ) }
 							help={ __(
-								'Select the size of the source image.'
+								'Select the size of the source images.'
 							) }
 							value={ sizeSlug }
 							options={ imageSizeOptions }