Height and weight are primary indicators, with additional body measurements available for fit confirmation.
A size label is not
a fit decision.
SmartFit turns the child profile, item measurements and fit rules into usable guidance. Telly does not size a child by age alone and does not hide uncertainty when the evidence is incomplete.

A polo, hoodie and sweatpant do not behave the same way. Fit logic is item-specific.
A recommendation should show when it is strong and when a parent needs another check.
Returns, exchanges and actual fit outcomes can improve future recommendations without manufacturing certainty.
Their job is to grow. Ours is to make getting ready easier.
SmartFit, Fit Passport and GrowthFit keep the fit decision grounded in the child and the garment instead of reducing it to age on a label.
Their Job Is to Grow
See the child-centred idea behind SmartFit, Fit Passport and GrowthFit: children grow; the fit journey should adapt around them.
SmartFit recommends. The family decides.
The purpose is to reduce avoidable fit mistakes while keeping the final choice understandable and reversible.