This helmet was for my son. I don't know about your kids - but my kids has a huge melon and had to get an XL adult helmet. Unfortunetly the helmets are all designed for people with more elongated skulls - my kids has more wider shape - so the front and back had some space. But they do have pads you can stick on to help with that but it still wasn't a perfect fit - but we have the same issue with bike helmets - so I'll just blame my husband who passed along his big head to my son. He wore this for both ski and snowboarding lessons and he didn't have any complaints.