In my opinion, boots are the most important part of your kid’s gear. Bad boots=more difficult skiing=unhappy kid. You want to ski as one big happy family? Everybody’s boots had better fit and everybody’s feet had better be warm (or at least close to warm).
Let’s assume you already own gear for your kids or you are trading with friends or buying at a ski swap – somewhere where you have to make the call on how long the skis should be. How do you tell if their skis are the right length?