diff --git a/platform/commonUI/dialog/src/DialogService.js b/platform/commonUI/dialog/src/DialogService.js
index f598f0da58..99d361cf81 100644
--- a/platform/commonUI/dialog/src/DialogService.js
+++ b/platform/commonUI/dialog/src/DialogService.js
@@ -89,7 +89,8 @@ define(
                 // will handle actual insertion into the DOM
                 this.overlay = this.overlayService.createOverlay(
                     key,
-                    model
+                    model,
+                    "t-dialog"
                 );
 
                 // Track that a dialog is already visible, to
@@ -230,6 +231,7 @@ define(
          * progress, as well as a series of actions that
          * the user can take if necessary
          * @param {DialogModel} dialogModel defines options for the dialog
+         * @param {typeClass} string tells overlayService that this overlay should use appropriate CSS class
          * @returns {boolean}
          */
         DialogService.prototype.showBlockingMessage = function(dialogModel) {
@@ -238,7 +240,8 @@ define(
                 // will handle actual insertion into the DOM
                 this.overlay = this.overlayService.createOverlay(
                     "blocking-message",
-                    {dialog: dialogModel}
+                    {dialog: dialogModel},
+                    "t-dialog-sm"
                 );
                 this.dialogVisible = true;
                 return true;
diff --git a/platform/commonUI/dialog/src/OverlayService.js b/platform/commonUI/dialog/src/OverlayService.js
index 5faba5dcf6..1874adb271 100644
--- a/platform/commonUI/dialog/src/OverlayService.js
+++ b/platform/commonUI/dialog/src/OverlayService.js
@@ -28,7 +28,7 @@ define(
 
         // Template to inject into the DOM to show the dialog; really just points to
         // the a specific template that can be included via mct-include
-        var TEMPLATE = '<mct-include ng-model="overlay" key="key"></mct-include>';
+        var TEMPLATE = '<mct-include ng-model="overlay" key="key" ng-class="typeClass"></mct-include>';
 
 
         /**
@@ -72,7 +72,7 @@ define(
          *        included overlay template (this will be passed
          *        in via ng-model)
          */
-        OverlayService.prototype.createOverlay = function (key, overlayModel) {
+        OverlayService.prototype.createOverlay = function (key, overlayModel, typeClass) {
             // Create a new scope for this overlay
             var scope = this.newScope(),
                 element;
@@ -87,9 +87,13 @@ define(
             // If no model is supplied, just fill in a default "cancel"
             overlayModel = overlayModel || { cancel: dismiss };
 
+            // If no typeClass is specified, set to default "t-dialog"
+            typeClass = typeClass || 't-dialog';
+
             // Populate the scope; will be passed directly to the template
             scope.overlay = overlayModel;
             scope.key = key;
+            scope.typeClass = typeClass;
 
             // Create the overlay element and add it to the document's body
             element = this.$compile(TEMPLATE)(scope);