diff --git a/styles/dh-attribution-sources.css b/styles/dh-attribution-sources.css
index 1411c30..0e0ab43 100644
--- a/styles/dh-attribution-sources.css
+++ b/styles/dh-attribution-sources.css
@@ -130,17 +130,18 @@
     background: transparent !important;
     border: 1px solid rgba(231, 76, 60, 0.3) !important;
     color: var(--dh-color-error) !important;
-    padding: 8px 10px !important;
     border-radius: 4px;
     cursor: pointer;
     transition: all 0.2s ease;
     align-self: flex-end;
     margin-bottom: 2px;
-    width: 36px;
+    flex: 0 0 32px;
+    width: 32px;
     height: 32px;
     display: flex;
     align-items: center;
     justify-content: center;
+    box-sizing: border-box;
 }
 
 .dh-attribution-sources-container .remove-group-btn:hover {
@@ -190,8 +191,9 @@
     background: transparent !important;
     border: 1px solid rgba(231, 76, 60, 0.2) !important;
     color: var(--dh-color-error) !important;
-    width: 28px;
-    height: 28px;
+    flex: 0 0 32px;
+    width: 32px;
+    height: 32px;
     border-radius: 4px;
     cursor: pointer;
     transition: all 0.2s ease;
@@ -199,6 +201,7 @@
     align-items: center;
     justify-content: center;
     padding: 0 !important;
+    box-sizing: border-box;
 }
 
 .dh-attribution-sources-container .remove-value-btn:hover {