Sleeveless Bodysuit For Boys, Organic Cotton, Mix, Set, 3 Pcs. CC CUB2201464These are the flexible sizes for respective age group as per mentioned in CM. Size Increase Approx Age Chest (CM) Waist (CM) Hips (CM) 44 Tiny Baby 36 36 37 50 New Born 38 38 39 56 1 2 M 40 40 41 62 0 3 M 42 42 43 68 3 6 M 44 44 45 74 6 9 M 46 46 47 80 9 12 M 48 48 50 86 12 18 M 50 50 52 92 2 Y 52 51 54 98 3 Y 54 52 56 104 4Y 56 53 58 Boy's organic cotton sleeveless bodysuit: in the set: 3 pcs. Material and technologies: 100% cotton (weight 200 g m2)