My daughter has 8 kg, size L (9-12kg) fits quite well. Since our little goes from birth potty and usually only once is a small amount "Warnpipi" by itself, the training pant does not deviate by. Unfortunately, it is quite expensive and dries very slowly (even after the dryer it was still slightly damp). For the way but the panties is really convenient because you do not have to take the entire wardrobe for the event that some games bib. Because of the price but I will start trying out a home wash wet pants more ...