Material: Glass + Alloy Pins 10 Sizes:(3 mm,4 mm,5 mm,6 mm,7 mm,8 mm,9 mm,10 mm,11 mm,12 mm) included, each size has 10pcs. Different sizes can meet your different needs Package Included : 1Box (100pcs) yellow glass eyes How to Use : You can make a loop with a pair of needle nose pliers then sew them on. Depending on what you are using them for and the material you are sticking them into, you can apply a little glue or hot glue to the metal pin first, and then push in Wide Application: Suitable for many kinds of puppets, doll, polymer clay, clay sculptures, stuff animals, felting animals, crochet and sewing projects etc