Should I size up junior bindings to accommodate growth?

Sizing up slightly is reasonable if the child is in an active growth period, but never more than one boot size up. The boot must still sit securely in the heel cup with the heel firmly seated — if the boot shifts laterally or the heel lifts, the binding is too large and unsafe. Adjustable straps can accommodate some growth, but an oversized heel cup cannot be compensated for. A better strategy is to buy correctly for the current season and plan to replace when outgrown.