Boxed invites

Does anyone know where to get square boxes for boxed invites? 7x7 or 6.5x6.5?

Any help is greatly appreciated!!!

I am sure stores like AC Moore or Michaels as them. I know the store called the Container Store has them to but I dont know if there are any on LI probably have a website.

I dont have any websites but I know there are quite a few that have them in bulk.