The Shaker includes four pieces: a 3mm thick MDF base, two frames of the same thickness and the 0.08mm thick acetate with front and back protection to prevent scratches (this is the blue part seen in the photo). Ideal for decorating album covers, cards, home decor, etc. Large shaker size: 11.5 cm x 10 cm Small shaker size: 6 cm x 5.3 cm