AMERICAN CRAFTS Stamp Collection: Acrylic Block. It's easy to get all your card making; scrapbook; and craft projects looking shipshape with this nifty acrylic block. Simply place clear stamps on the block using the grid and rulers to ensure a straight and accurate layout every time. Apply ink to the stamp; position the image onto the desired surface; and press down firmly. Voila! Every project looks amazing! Each block measures 4 x 7.5 x .75 inches overall; the surface gird lines are in .5 inch increments both horizontally and vertically; and the two edge rulers each have .25 inch increments. This package contains one acrylic stamp block.