Crystal clear round acrylic blocks. Use these acrylic blocks with your favorite clear stamps to decorate your planner, journal, or craft projects. This set includes two round blocks: one measuring .9" (2.3 cm) in diameter and one measuring .7" (1.8 cm) in diameter. The blocks are .98" (2.5 cm tall), making them easy to hold and perfect for your small stamps. Positioning stamps in exactly the right place is so easy!