Banwood Helmet 50-54 cm: When to Size Up From a Toddler Helmet

By Kids Balance Bikes & Bicycles with Wicker Basket | Published: 2026-11-01

Category: How-to Guides

Learn the signs a toddler helmet is too small and how to measure your child's head before moving to the Banwood 50-54 cm helmet. Includes a fit check and dial adjustment steps.

Quick answer

Move your child into the Banwood 50-54 cm helmet when their head measures at least 50 cm around and the old helmet no longer sits level or tightens evenly. Measure first, then use the dial and chinstrap to set a snug, level fit.

Why a 50-54 cm helmet is a transition size, not a forever size

The Banwood 50-54 cm helmet is designed to cover a specific head circumference range, so it works best when your child's measurement sits inside that window with room to grow. A helmet that is too large can rock forward over the eyes or slide back, while one that is too small leaves no space for the dial to tighten. Treat the size range as a guide, not a guarantee: the dial-fit system and adjustable chinstrap do the final fitting work, and you should recheck both as your child grows.

Signs your toddler has outgrown the current helmet

A toddler helmet is too small when the shell sits high on the head, the dial is already fully tightened, or the chinstrap cannot be adjusted to sit flat under the chin. You may also notice red pressure marks on the forehead or sides after a short ride. These signs matter more than your child's age, because head size varies widely between toddlers.

How to measure, size up, and fit the Banwood 50-54 cm helmet

Measure head circumference: Wrap a soft tape measure around the widest part of your child's head, just above the eyebrows and around the back bump. Keep the tape level and snug but not tight. Repeat once to confirm the number. Write down the measurement in centimeters; you will compare it to the 50-54 cm range.
Compare the measurement to the size range: If the measurement is below 50 cm, the 50-54 cm helmet is likely too large even with the dial fully tightened. If it is 50 cm or above, the helmet is a candidate. If it is above 54 cm, look for a larger size. A measurement at the very bottom of the range may leave little room to grow; check the dial has enough take-up.
Check the old helmet for too-small signs: Put the current helmet on and try to tighten the dial. If it is already at its tightest and the shell still shifts, or the chinstrap cannot sit flat under the chin, the helmet is too small. Also look for red marks after a few minutes. Do not rely on the label alone; the dial position and strap fit are the practical test.
Set the dial before the first ride: Put the Banwood helmet on with the dial loosened, then turn the dial until the helmet feels snug but not painful. The front edge should sit just above the eyebrows and the helmet should not tilt forward or back when you gently press it. If the dial is at maximum tightness and the helmet still moves, the size is wrong, not the adjustment.
Adjust the chinstrap and do a fit check: Fasten the chinstrap and tighten until you can fit no more than one finger under it. Ask your child to open their mouth wide; the helmet should pull down slightly. Shake your head gently side to side; the helmet should stay in place without sliding over the eyes. Recheck the chinstrap each ride, since toddlers often loosen it without noticing.

Product facts

BANWOOD HELMET - DARK GREEN (50-54 cm): The Banwood Classic Kids Bike Helmet in Dark Green is sized 50-54 cm and uses a dial-fit adjustment system with an adjustable chinstrap. That range and dial let you fine-tune the fit as your child's head grows within the size, so measure before assuming you need the next size up.
BANWOOD HELMET - DARK GREEN (50-54 cm)