diff --git a/addons/project/static/src/scss/project_sharing/chatter.scss b/addons/project/static/src/scss/project_sharing/chatter.scss
index 5f63bb31f59..e8a83319268 100644
--- a/addons/project/static/src/scss/project_sharing/chatter.scss
+++ b/addons/project/static/src/scss/project_sharing/chatter.scss
@@ -22,6 +22,10 @@
             }
         }
 
+        .o_portal_chatter_avatar {
+            width: 45px;
+            height: 45px;
+        }
     }
 
     &.o-aside {