Kids Bike Helmet by XJD for Boys & Girls – Black, Blue, Green, Pink, Purple

Product details

The XJD Kids Bike Helmet covers a wide 2-to-8-year age range thanks to two head-circumference sizes, and it comes in five colors — Black, Blue, Green, Pink and Purple — so your child can actually pick one they'll want to wear. Its dial-adjust fit system is the standout for parents: you turn a rotary knob at the back to snug the helmet to your child's exact head size rather than hoping a fixed size fits.

What age and head size is it for?

XJD lists this helmet for kids 2–8 years old, split across two sizes by head circumference. Size S fits heads 18.11"–20.08" (46–51 cm) — typically toddlers and younger preschoolers — and Size M fits heads 20.47"–22.05" (52–56 cm), which suits most kindergarteners through early elementary ages. Measure your child's head just above the eyebrows and buy by centimeters, not by age, for the best fit.

Key features

• Dial-and-buckle fit system: straps plus a rotary knob and chin strap adjust to the wearer's head circumference.
• Custom-fit lining: foam lining pairs with flexible, adjustable straps for a snug, comfortable fit.
• Lightweight design: adaptable and light enough for comfortable all-day wear.
• Five color choices: Black, Blue, Green, Pink or Purple, each available in both S and M.
• Wide age coverage: designed for kids 2–8 years old.

How does the fit system work?

Instead of a one-size shell, this helmet uses three adjustment points working together: the rotary knob at the rear tightens or loosens the inner frame around the head, the side straps set the vertical position, and the chin strap locks everything in place. That combination is why one helmet can serve a 2-year-old and an 8-year-old — within the right size range — and why it stays put when your child looks around or hits a bump.

Which color and size combinations are available?

Every color — Black, Blue, Green, Pink and Purple — comes in both S (46–51 cm) and M (52–56 cm), for ten total combinations. Double-check the exact color and size shown in the selector before adding to cart, since options are listed separately.

Safety and daily use

• Brand: XJD
• Category: Bike Helmets
• Designed for: boys and girls, ages 2–8
• Size S: 18.11"–20.08" / 46–51 cm head circumference
• Size M: 20.47"–22.05" / 52–56 cm head circumference
• Adjustment: rotary knob, adjustable straps, chin strap, foam lining

Pair the helmet with age-appropriate protective gear and active adult supervision, and replace any helmet after a significant impact, even if the damage isn't visible.

Bottom line: measure first. If your child's head is 46–51 cm, pick S; if it's 52–56 cm, pick M. If their head is larger than 56 cm, move up to an older-kid or adult-small helmet rather than squeezing into this one.