3dRose Think Like a Proton and Stay Positive Green 2.25 x 2.25 Inches Key Chains, Set of 2 (kc_173354_1) Made of heavy-duty durable plastic with high gloss finish Available in sets of 2, 4 or 8 Dimensions: 2 3/8" W x 2 3/8" H x 3/8" D Image printed on both sides of key chain. Hardware included