This Bodysuit made from 100% natural organic materials - 70% merino wool and 30% silk. It is soooo soft and cute. Merino wool is the softest wool - ideal for baby's skin. It is natural body temperature regulator, especially when worn against the skin. Merino wool excellent absorb and repel moisture. Wool and silk both are very breathable. Such Body will be absolutely great as underwear or just as cute Bodysuit. Size 0-3 months, for height 50-56 cm (19,5 - 22 inches), Length of Bodysuit 38 cm (15 inches), Length of sleeve 20 cm (8 inches). Size 3-6 months, for height 62-68 cm (24-27 inches), Length of Bodysuit 41 cm (16 inches), Length of sleeve 23 cm (9 inches). Size 6-12 months, for height 74-80 cm (29-31 inches), Length of Bodysuit 43 cm (17 inches), Length of sleeve 27 cm (10,5 inches). Size 12-24 months, for height 86-92 cm (34-36 inches), Length of Bodysuit 47 cm (18,5 inches), Length of sleeve 30 cm (11,5 inches).