Our Inflatable Kids Swim Vest is just what your child needs for a safe and enjoyable swimming experience! With sizes designed for children 3-6 years old, 39-55 lbs (18-25 kg), and a durable PVC plastic material, this vest is the perfect fit for your youngster. Choose from S, M, or L - 31-43 in (80-110 cm), 43-55 in (110-140 cm), or 55 in and above (140 cm and above).