Hipsterkid Baby Opticals - Polarized Sunglasses w/Strap & Case - Kids/Girl/Boy - Break It or Lose It Warranty (Wood)(Ages 3-6) SAFETY FIRST: These specs are designed specifically with delicate eyes in mind. Polarized for 100% UVA and UVB protection, sturdy yet flexible frames, shatter-resistant lenses, and every pair comes with a stay-on strap. NONTOXIC: Hipsterkid sunglasses maintain your child's health and style at the same time! Every pair is BPA, Phthalate, and PVC free and complies with FDA, CPSIA, and CE standards. SIZE IT UP: Please check the size chart before purchasing, as sizing tends to run small. EASY REPLACEMENT: Kids will be kids, right? That's the fun part! And that's the reason why every pair of Hipsterkid sunglasses comes warranty- guaranteed. Break 'em, drop 'em, lose 'em it doesn't matter! Replaceable glasses must have been purchased within the past year and be registered on the FCTRY website. HOT COMMODITY: Everyone knows the coolest kid on the block has the hottest shades. With a variety of chic colors and patterns to choose from, your child can rock a hip pair specifically crafted to fit their personality, enthusiasm, and energy. 10mm =  inch 38mm = 1  inches 43mm = 1  inches 110mm = 4  inches 120mm = 4  inches Strap to keep glasses on and prevent loss Flexible frames that resist twisting and tension Shatter resistant lenses to guard against breakage