The measurement of the size for the Long Sleeves Pyjamas = (Shirt Length, Bust, Sleeve Length, Waist, Pants Length) XS for 1-2 years old = (36, 36, 38, 25, 59) cm S for 2-3 years old = (38, 38, 39, 27, 50) cm M for 3-4 years old = (40, 40, 40, 29, 61) cm L for 4-5 years old = (42, 42, 41, 31, 62) cm XL for 5-6 years old = (44, 44, 42, 33, 63) cm 6/7 For 6-7 year old ( 46, 46, 43, 35, 64 ) cm 7/8 For 7-8 Year old ( 48, 48, 44, 37, 65 ) cm 8/9 For 8-9 Year old ( 50, 50, 45, 39, 66 ) cm 9/10 For 9-10 Year old (52, 52, 46, 41, 67 ) cm