diff --git a/packages/block-library/src/comment-reply-link/block.json b/packages/block-library/src/comment-reply-link/block.json
index c10129412145c..68aa93c3c1526 100644
--- a/packages/block-library/src/comment-reply-link/block.json
+++ b/packages/block-library/src/comment-reply-link/block.json
@@ -25,7 +25,11 @@
 		},
 		"spacing": {
 			"margin": true,
-			"padding": true
+			"padding": true,
+			"__experimentalDefaultControls": {
+				"margin": false,
+				"padding": false
+			}
 		},
 		"typography": {
 			"fontSize": true,
@@ -40,6 +44,13 @@
 				"fontSize": true
 			}
 		},
+		"__experimentalBorder": {
+			"radius": true,
+			"color": true,
+			"width": true,
+			"style": true
+		},
 		"html": false
-	}
+	},
+	"style": "wp-block-comment-reply-link"
 }
diff --git a/packages/block-library/src/comment-reply-link/style.scss b/packages/block-library/src/comment-reply-link/style.scss
new file mode 100644
index 0000000000000..7eca6cee1aa97
--- /dev/null
+++ b/packages/block-library/src/comment-reply-link/style.scss
@@ -0,0 +1,4 @@
+.wp-block-comment-reply-link {
+	// This block has customizable padding, border-box makes that more predictable.
+	box-sizing: border-box;
+}
diff --git a/packages/block-library/src/style.scss b/packages/block-library/src/style.scss
index 8549b80ae89de..a8819c2084dc2 100644
--- a/packages/block-library/src/style.scss
+++ b/packages/block-library/src/style.scss
@@ -14,6 +14,7 @@
 @import "./comment-content/style.scss";
 @import "./comment-author-name/style.scss";
 @import "./comment-edit-link/style.scss";
+@import "./comment-reply-link/style.scss";
 @import "./cover/style.scss";
 @import "./details/style.scss";
 @import "./embed/style.scss";