Perfect size for my 6 yo's ski boots, helmet, goggles, an extra layer of clothing or two and her snacks/drinks.  I'm hoping even her next few sizes of ski boots will fit (current boots are equivalent to shoe size 13 I think).  It's not as bulky as my adult bag so she is able to carry it all by herself.  Definitely helps the whole family enjoy a ski day if she can carry her own things!