diff --git a/RELEASE-NOTES.md b/RELEASE-NOTES.md
index 5e8f60089..90ae9d372 100644
--- a/RELEASE-NOTES.md
+++ b/RELEASE-NOTES.md
@@ -9,6 +9,7 @@
 - **Modal** - Modal will now focus first tabable element, not just `input` #4370
 
 **Bugs**
+- **Comments** - Adds missing sizes (mini, tiny etc) #4408
 - **NPM** - Fixed `package.json` to allow either jQuery `2.x` or `3.x` #4254
 - **Button/Dropdown** - Fixed issue where `ui dropdown button` could have incorrect spacing for dropdown icon
 - **Form/Segment** - Fix typo causing `pointer-events: none` no to work on `loading segment` and `loading form`
diff --git a/src/definitions/views/comment.less b/src/definitions/views/comment.less
index 7009ebf40..d42d5f17a 100755
--- a/src/definitions/views/comment.less
+++ b/src/definitions/views/comment.less
@@ -235,10 +235,17 @@
   opacity: 1;
 }
 
-/*--------------------
-       Sizes
----------------------*/
 
+/*-------------------
+        Sizes
+--------------------*/
+
+.ui.mini.comments {
+  font-size: @mini;
+}
+.ui.tiny.comments {
+  font-size: @tiny;
+}
 .ui.small.comments {
   font-size: @small;
 }
@@ -248,8 +255,15 @@
 .ui.large.comments {
   font-size: @large;
 }
+.ui.big.comments {
+  font-size: @big;
+}
 .ui.huge.comments {
   font-size: @huge;
 }
+.ui.massive.comments {
+  font-size: @massive;
+}
+
 
 .loadUIOverrides();