In general, both wool walk overalls and wool fleece overalls are cut slightly larger to allow you to comfortably layer multiple pieces of clothing underneath. Therefore, we recommend choosing the size that currently fits your child. For example, if size 80 fits well, we suggest opting for the next size up, which is 86/92, to ensure the overall lasts throughout the winter. It is also important to note that if the suits are too large, your child will need to use additional energy to warm up and maintain the warmth of the air pockets within the suit.