Use the lock and key pop-ems to add dimension to your projects. Use them to add a 3D effect. Pop-ems are lighter and more flexible than MDF pieces, these sets are perfect for card making and can be decorated in all manner of mediums, including Cosmic Shimmer Inks, Paints and Glitters. Simply fix into place with Cosmic Shimmer Acrylic Glue to give craft projects a real 3D effect. Size: 8.9 x 6.3 inches.