Junior Club Sizing Guide

Juniors are sized by height, not age, and outgrow clubs on a schedule. This guide checks the set they have, flags the two mistakes that matter (too long, and kept too long) and plans the next re-check from typical growth rates.

Height is the only required input. Age tightens the re-check window; the current 7-iron and the set's printed range add sanity checks.

Units

Standing tall in golf shoes or trainers.

Only used to estimate growth rate.

Grip end to sole along the shaft. Any mid iron will do.

Junior sets are sold for a height band; enter the upper number.

Five things that matter more than any chart

  1. Height, not age. Junior sets are built for height bands. Two children the same age can be a full size apart.
  2. Slightly short beats too long. A club that is too long forces a flat, wristy swing that takes years to unlearn. A slightly short one just costs a few yards.
  3. Light beats heavy. Junior-specific shafts and heads keep the swing free. Cut-down adult clubs are too heavy and too stiff.
  4. Fewer clubs, correctly sized. A driver or wood, two irons, a wedge and a putter are plenty until the swing is settled.
  5. The hands-hang test. Arms relaxed, sole flat, no reaching and no crouching. If the child adjusts to the club, the club is wrong.

How the checks work

Proportional check. Adult standard length (a 37-inch 7-iron for a 69.5-inch golfer) is scaled by the junior's height. A current 7-iron more than 1.5 inches longer than that is flagged as too long; more than 2.5 inches shorter is flagged as outgrown. The asymmetry is deliberate: too long is the costly mistake. Junior brands build to their own charts and often run a touch longer than the proportional line, which is why this is a sanity check rather than a recommended length.

Re-check timing. Junior size bands cover about three inches of height, so the guide plans a re-check after roughly 2 inches of growth. Growth rates come from paediatric guidance: about 2 to 2.5 inches (5 to 6 cm) a year from age six to the start of puberty, then 3 to 4 inches (8 to 10 cm) a year at peak, slowing in the late teens. Age is optional; without it the guide uses the wide band.

During a growth spurt

Re-check every three months, watch posture at address rather than the calendar, and expect to size up mid-season. Second-hand junior sets in the next size are the economical way through these years.

When the junior reaches about 4'10" (147 cm) the adult calculator starts to apply, usually at minus one to minus two inches from adult standard, but junior-flex shafts are still the better choice until swing speed catches up.

Also worth checking

Grip size matters for small hands, and gapping shows whether a short set covers the distances the junior actually plays.

Step 3: Grip Size FinderA starting grip size from a hand measurement, with a glove-size fallback and the dynamic check that confirms it.Open Step 6: Bag Gapping CalculatorEnter carry distances, see every gap and overlap, and keep the map on this device.Open

Track the junior's real distances.

Knowing how far a junior actually carries each club is the best guide to which few clubs to carry. Golfonaut on Apple Watch records shots and shows distance per club during rounds.

Get Golfonaut for Apple WatchMap your carry gaps first

Free on the App Store. Requires an Apple Watch and iPhone. Your fit results stay in this browser; nothing is uploaded.