diff --git a/kallithea/public/css/style.css b/kallithea/public/css/style.css
--- a/kallithea/public/css/style.css
+++ b/kallithea/public/css/style.css
@@ -119,6 +119,11 @@ table.changesets .date,
 table.changesets .comments {
   white-space: nowrap;
 }
+/* textareas should be at least 100px high and 400px wide */
+textarea.form-control {
+  min-height: 100px;
+  min-width: 400px;
+}
 .form-group > label {
   float: left;
 }
diff --git a/kallithea/public/less/style.less b/kallithea/public/less/style.less
--- a/kallithea/public/less/style.less
+++ b/kallithea/public/less/style.less
@@ -135,6 +135,12 @@ table.changesets {
   }
 }
 
+/* textareas should be at least 100px high and 400px wide */
+textarea.form-control {
+  min-height: 100px;
+  min-width: 400px;
+}
+
 .form-group > label {
   float: left;
 }