*NEW Hunkydory Crafts Mirri Mats - Rainbow - 100 sheets. Made to compliment our brand new Topper Decks, these Mirri Mats have been perfectly sized so that you can easily mat- and layer them with the Topper Decks for that lovely Mirri frame around your toppers. Each pack contains approximately 100 sheets of Rainbow Mirri mats. Size: 2 5/8 in. x 3 5/8 in. These are 1/8 of an inch larger than an Artist Trading Card, but cut these down to 2 1/2 in. x 3 1/2 in. and you have 100 amazing foil mirri rainbow backgrounds.