diff --git a/html.c b/html.c
index 42996e6..4109929 100644
--- a/html.c
+++ b/html.c
@@ -55,7 +55,7 @@ xs_str *replace_shortnames(xs_str *s, xs_list *tag, int ems)
             tag_list = xs_dup(tag);
         }
 
-        xs *style = xs_fmt("height: %dem; vertical-align: middle;", ems);
+        xs *style = xs_fmt("height: %dem; width: %dem; vertical-align: middle;", ems, ems);
 
         xs_list *p = tag_list;
         char *v;
diff --git a/utils.c b/utils.c
index d00f513..0523cac 100644
--- a/utils.c
+++ b/utils.c
@@ -49,7 +49,7 @@ static const char *default_css =
     ".snac-top-user { text-align: center; padding-bottom: 2em }\n"
     ".snac-top-user-name { font-size: 200% }\n"
     ".snac-top-user-id { font-size: 150% }\n"
-    ".snac-avatar { float: left; height: 2.5em; padding: 0.25em }\n"
+    ".snac-avatar { float: left; height: 2.5em; width: 2.5em; padding: 0.25em }\n"
     ".snac-author { font-size: 90%; text-decoration: none }\n"
     ".snac-author-tag { font-size: 80% }\n"
     ".snac-pubdate { color: #a0a0a0; font-size: 90% }\n"