Now in Thin, half the height of our standard 3D Foam! Add dimension without bulk! Save postage on cards without compromising the element of dimension, and make scrapbook pages with half the bulk. Each sheet has 154 squares measuring 6.35x6.35 mm (.25x.25 inch), all are 1mm thick. Spaced for quick removal. The top liner is easy to peel off. Great for all types of materials. Acid-free and archival safe. Imported.