You may be talking about the original paper jam. There are many specifications of cardboard used to make photo frames. Generally, it is 77* 106cm, 100* 120cm, 100* 160cm, 100*200cm. What color do you want? You can look at this page first/ywxkkz/album/%cf% E0% BF% F2% BF% A8% D6% BD% D1%D5% C9% AB. See if there is a suitable one. If you don't understand, you can call for advice.