diff --git a/dicom-viewer/src/App.tsx b/dicom-viewer/src/App.tsx
index 061aed3..179d38a 100644
--- a/dicom-viewer/src/App.tsx
+++ b/dicom-viewer/src/App.tsx
@@ -3179,17 +3179,18 @@ function App({ container_id, imageStacks, autoCacheStack, annotationJson, viewer
                           background: "transparent",
                           color: "#f44336",
                           border: "1px solid #f44336",
-                          borderRadius: 4,
-                          width: 20,
-                          height: 20,
-                          fontSize: 12,
+                          borderRadius: 3,
+                          width: 16,
+                          height: 16,
+                          fontSize: 10,
                           lineHeight: 1,
                           cursor: "pointer",
-                          marginLeft: 6,
+                          marginLeft: 4,
                           display: "flex",
                           alignItems: "center",
                           justifyContent: "center",
                           opacity: 0.95,
+                          padding: 0,
                         }}
                         title="Delete this annotation"
                         aria-label="Delete annotation"