Size measures 18mm, about 0.71 inches Package includes 40pcs (20 pairs) sticker eyes. Color will send randomly, so you will NOT get all the colors shown on the picture. There is a transparent clear backing film on the glass cabochon flat side, you need to peel it off and stick. Easy and simple to use. The printed eyes has a lot of details and vivid image, You can pretty much put eyeballs on anything and it will "come to life" .Use your imagination! It's fun to make new friends in your house, office, school. The adhesive it's strong and easy to use. Much more interesting than the old black white googly wiggle eyes. It is much more lifelike! It will gives you lots of fun by putting this self adhesive googy's everywhere you go.e.g One banana , Your mug, your computer screen etc.Also Great for DIY craft project and will bring you lots of laugh. 40PCS 18mm Self Adhesive Dragon Animal Eye Googly Wiggle Eyes for DIY Craft Sticker School Classroom Arts Crafts Decoration