Speedo Girls HyperBoom Splice MusclebackIconic Speedo Style. This sporty bright blue Muscleback swimsuit features a curved splice of Speedo’s new 'shattered' Boom logo print in shades of blue and green. Great for longer swim sessions, the muscleback style enables your child to achieve a full range of motion during their swim. Made from their soft Endurance10 fabric, it provides higher chlorine resistance than standard swimwear fabrics and fits like new for longer with CREORA® HighClo™.Features:Endurance 10If you are swimming in chlorine regularly Endurance + range will be more suited.Designed as Speedo's most comfortable fabrication with shape retention benefitsMuscleback - great for longer swim sessions with the design allowing full range of motionShape Retention - fabric stretches so you can enjoy your swim without feeling restrictedGusset lined- for modesty and support80% Polyamide 20% Elastane (Creora HighClo)SizingApprox. Age Height (CM) Chest (CM) Waist (CM) Hips (CM) Speedo Size7-8 128 66.5 59 70 69-10 140 72 62 76 811-12 152 77.5 65 84 1013-14 164 84 69 90 1215-16 176 90.5 73 96 14Speedo swimsuits are designed to have a close fit to your body to help you have the best swim. If you would like a looser fit you can go up a size.How to Measure Your Child:Height - Remove their shoes and measure their height against a wall.Chest - Measure under the arms at the fullest part of the chest.Waist - Measure around their navel (bend to the side to find the dent, this is where the waist is).Hip - Measure around the widest part of the hips and bum.