Material Glass Alloy Pins; Strong and durable, can be used for a long time 10 Sizes3 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 deep brown 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