diff --git a/templates/admin/default/assets/less/thelia/bootstrap-select.less b/templates/admin/default/assets/less/thelia/bootstrap-select.less
index 10d019be5..9c5f1fc28 100644
--- a/templates/admin/default/assets/less/thelia/bootstrap-select.less
+++ b/templates/admin/default/assets/less/thelia/bootstrap-select.less
@@ -48,12 +48,12 @@
 }
 
 .bootstrap-select:not([class*="span"]) {
-    width: 220px;
+    width: 100%;
 }
 
 .bootstrap-select {
     /*width: 220px\9; IE8 and below*/
-    width: 220px\0; /*IE9 and below*/
+    width: 100%\0; /*IE9 and below*/
 }
 
 .bootstrap-select > .btn {