Sticky Thumb Adhesive Foam Dots 272 Assorted Sizes. Boy, this is all you need!! Make your art pop out with these great foam dots. Great for use with ATCs, greeting cards and more. Makes your images pop right off the paper! 1/4 in. x 1/4 in. squares and 1/2 in. x 1/2 in. squares. 4 sheets with a total of 272 foam dots. Acid free and photo safe.