diff --git a/src/components/Lightbox/chrome/CircleChromeButton.tsx b/src/components/Lightbox/chrome/CircleChromeButton.tsx
index 1db2c8c317..9b31266bd3 100644
--- a/src/components/Lightbox/chrome/CircleChromeButton.tsx
+++ b/src/components/Lightbox/chrome/CircleChromeButton.tsx
@@ -28,7 +28,7 @@ type Props = {
 >
 
 const SIZE = 32
-const RADIUS = 24
+const RADIUS = SIZE / 2
 const ICON = 18
 
 export function CircleChromeButton({