This is an acrylic block for use with clear and cling stamps. Your chosen stamp/s will stick to this block, so you can position and reposition them on the block before inking and stamping onto your paper or card. The other advantage of the clear stamps and acrylic blocks is that you can see through them when you are trying to line up your image on the paper, allowing you to build up your image and get it exactly where you want it first time around. No more annoying mistakes. The block is 50mm x 50mm in size and about 10mm thick, with curved sides to make it easier to hold.