Docrafts Papermania - Clear Stamping Blocks. This is a pack of 2 small 8mm thick Papermania clear acrylic blocks. Sizes 1 3/4"  x 1 3/4" (44mm x 44mm) and 1 3/4"  x 3" (44mm x 76mm) for mounting clear stamps. Printed with a grid to assist in lining up multiple stamps on one block, such as lettering.