Vkenis Swimming Equipment Child Inflatable Swim Vest Aerated Life Jacket for Beginners Kids A B C Size Size: ALength:24"(Suggest 8-18 years old kid with 140cm height) BLength:22"(Suggest 5-8 years old kid with 110-140cm height) CLength:18"(Suggest 3-5 years old kid with 80-100cm height) Two sets of security buckle design, comprehensive protection for the child's safety, simple operation, adjustable, comfortable and convenient and safe. Using split structure, with a plurality of separate inflatable hole overall divided into a plurality of regions, even where a leak area, it will not affect other areas. Neckline reinforcing process, so that the collar will not tear Environmentally friendly materials:High-density PVCwithout any harm to the body, safe and practical.