Grimm's Glittering Stones - Set of Acrylic Jewels for Pretend Play, Math, Decorating & Crafts Includes 100 "jewels" in assorted colors, shapes and sizes Sizes vary in diameter from 1 to 2.5 cm (about 0.4 to 1.0 inches across) Made from acrylic with a flat mirrored surface on bottom Use as a decoration on a seasonal table or as part of a beautiful "scene" set up with building blocks & dolls Fun, beautiful objects with many uses including: sorting, counting, and practicing early math skills like addition & subtraction