In most cases, we recommend a ¾-length insole for children. This is because a ¾-length insole for children has two major advantages:
First, a ¾-length children’s insole doesn’t need to be trimmed and can simply be added atop the factory insoles already inside your child’s shoes. This makes it easy to add the insoles without worrying about trimming them for a perfect fit, and it makes it easy to move the insoles from one pair of shoes to another.
Second, since ¾-length children’s insoles don’t need to be trimmed, they can also continue to be used as your children grow into the next size shoe. If you were to purchase a full-length children’s insole, when your child grows from a size 12 to size 13 shoe, the insoles you originally purchased wouldn’t fit inside the shoe properly. However, with a ¾-length children’s insole, you could move the insoles from the size 12 to size 13 shoe without issue. All children’s insoles should list which shoe sizes correspond to the insole size; most cover a range of at least two consecutive sizes, and we recommend following the sizing guidelines the brand issues.