diff --git a/modules/rubiconBidAdapter.js b/modules/rubiconBidAdapter.js
index d8b101b6318..5193efb6358 100644
--- a/modules/rubiconBidAdapter.js
+++ b/modules/rubiconBidAdapter.js
@@ -94,7 +94,9 @@ var sizeMap = {
   229: '320x180',
   232: '580x400',
   257: '400x600',
+  264: '970x1000',
   265: '1920x1080',
+  278: '320x500',
   288: '640x380'
 };
 utils._each(sizeMap, (item, key) => sizeMap[item] = key);