CONTENTS: 12 silicone rubber bracelets / 6 different designs / 2 pieces per design. SIZE: 8 inches circumference with slight elasticity; one size fits most. Giftphoria's assortment pack of 1 dozen math and science bracelets is designed to provide a bulk gift solution for STEM (Science Technology Engineering Mathematics) students and teachers. An ideal party favor for any math or science party or event, these statement wrist bands make it stylish and cool to be a math or science lover! Math and science teachers will find that these make a convenient classroom prize or award for exceptional students, end of school year rewards and incentives, or academic competitions. Throw these educational gifts into goodie bags, use them as giveaway items, or attach a keyring to convert these useful wristlets into keychain lanyards. Each pack of 1 dozen wristbands includes 2 pieces of the following designs: The World Runs on Science, Proton Positivity, Science Has All the Solutions, Inspire with Pi, Math is my Superpower, and E=mc2.