Make Beautiful Custom Large size boxes! Cut all on 12 x 12 mats so there is no larger size material needed Again using heavy cardstock such as watercolor 140lb or my personal preference Cricut Kraftboard along with Cricut Cardstock in Red and Cricut Silver Glitter Cardstock. The Acetate window is Cricut's Foil Acetate from the Metallic Sampler. The finished box outside dimensions are 10L x 8 3/4W x 4D and inside 9Lx7Wx4D. Watch the tutorial here!