The size of the sleeping bags is indicated in their length and not in the size of the clothing. It is best to measure the height of the child at the shoulders, this height corresponds to the length of the sleeping bag. The baby's head remains outside. The head of a 10-month-old child measures approx. 16 cm and a two-year-old child approx. 22 cm - this must be deducted from the size of the clothes or the total height.
A practical tip is to choose a smaller sleeping bag with legs and a larger sleeping bag classic. In the leg sleeping bag, the hems on the legs can be used as socks and are therefore not included in the length of the sleeping bag (approx. 10 cm). Often, customers order a larger size so that the sleeping bag lasts a long time, but then the child falls out of the sleeping bag because it is too big. It is really better to measure the child's shoulders before buying a sleeping bag.