Small 2 1/4″x 1 3/4″x 5/8″ and Medium 3 1/2″x 2 1/2″x 5/8. Inkadinkado® Clear Acrylic Stamp Blocks are specially designed to use with their great new clear stamp collection. Just peel off, one or more of the clear stamps from their plastic sheet, and stick it on to one of these blocks, ink with your favorite kind of ink and voila you’re ready to stamp. With both the block and the stamp being clear it lets you see exactly where you are stamping the image. Small & Medium- Blocks have etched centering lines for accurate stamping and exclusive ergonomic NO-SLIP grip. Blocks measure approximately; Small 2 1/4″x 1 3/4″x 5/8″ and Medium 3 1/2″x 2 1/2″x 5/8″.