Add dimension to your craft projects with these adhesive dots. Pre-cut and easy to use, these foam circles feature double-sided adhesive, and because they're acid free, you can safely use them on all of your valuable keepsakes and collectables. Details:1/4", 5/16" and 1/2" diameter assortment0.1"/ 3 mm thick each12 packs (275 dots per pack, 3300 total)Double-sided adhesiveDimensionalPermanentAcid free