Best Way to....

[steve B]

Originally Posted by quitcrab

Place the card in a bigger sized top loader and tape it behind the mat. That works great. Use a new toploader... It works great.. the card may shift over time a little, but I have had good luck with this method.

That can work.

What I do is to use the self adhesive "archival" clear photo corners. I use those to put the item on a mat behind the cutout mat.
You just have to be sure the frame can handle two layers of mat.