Kids Helmets

[Kids Helmet Sizes by Age — Head Circumference Guide]

Helmet sizing is based on head circumference in centimetres, not age. The table below shows the typical range for each age group as a starting point. Measure your child before ordering, because heads of the same age vary by several centimetres.

Age	Typical head circumference	Usual helmet size
1–2 years	46–50 cm	XXS / XS
2–3 years	48–52 cm	XS / S
3–5 years	50–54 cm	S
5–8 years	52–56 cm	[S / M]
8–12 years	54–58 cm	M
12 years and up	56–60 cm	M / L

What size helmet does a 2 year old need? Most 2 year olds measure between 48 cm and 50 cm and fit an XS or small kids helmet. A helmet at this age should sit level, cover the back of the head fully, and adjust down far enough that it does not rock forward or back.What size helmet does a 5 year old need? Most 5 year olds measure between 50 cm and 54 cm and fit a small kids helmet. Look for a dial-adjust retention system at this age, because it allows the same helmet to grow with your child across two or three seasons.See Helmet range for kids ages 2-5.What size helmet does a 7 year old need? Most 7 year olds measure between 52 cm and 56 cm and fit a small or medium youth helmet. Ventilation matters more at this age, since school-age riders wear their helmet for longer stretches.See Helmet for kids ages 5-8.Sizes vary between brands. Always check the size chart on the individual product page against your child’s measurement. If you are between sizes, contact our team before ordering — a correct first fit is faster than an exchange.

Toddler Helmet or Youth Helmet — What Changes at Age 5

A toddler helmet and a youth helmet are built to different priorities. Toddler helmets, roughly ages 2 to 5, focus on low weight and deep rear coverage, because young riders fall backwards more often and lose patience with anything heavy. Youth helmets, roughly ages 5 to 8, shift toward ventilation and all-day comfort, because this is the age group that wears a helmet for hours at a time on school and neighbourhood rides.The practical trigger for moving up is not a birthday. It is when your child’s head measurement passes the top of the current helmet’s adjustment range, or when the retention dial is already wound fully out. A helmet at maximum adjustment has no room left to hold a secure fit.

MIPS or Standard — Is It Worth It for a Child

MIPS stands for Multi-directional Impact Protection System. A low-friction liner allows the helmet shell to rotate slightly during an angled impact, reducing rotational force transferred to the brain. Most real-world falls are angled rather than straight-on, which is why the technology exists.For a toddler on a balance bike at walking pace, a correctly fitted AS/NZS 2063 certified helmet is doing the work that matters. For an older child riding trails, pump tracks or at speed, MIPS is a reasonable upgrade. In every case, a well-fitted standard helmet outperforms a poorly fitted MIPS helmet. Fit first, technology second.

Full Face or Open Face — Which One Your Child Actually Needs

A full face kids helmet adds a fixed chin bar and is designed for downhill mountain biking, BMX racing and jump lines, where face and jaw contact is a real risk. It is heavier, hotter, and restricts hearing and peripheral vision.For everyday riding balance bikes, school runs, footpaths, scooters, skate parks and general trail riding an open face helmet is the correct and safer everyday choice, because a child will actually keep wearing it. The dual certified helmets in this range cover both cycling and skate use, which is what the majority of Australian families need from a single helmet.

Bike Helmet or Skate Helmet — Why Dual Certified Matters

A bike helmet is built to absorb one large impact. A skate helmet is built to survive repeated smaller impacts and covers lower at the back and sides for backward falls. A child who rides a bike on Saturday and a scooter at the skate park on Sunday needs both properties.A dual certified helmet meets both standards in one shell, which means one purchase instead of two and no guesswork about which helmet belongs with which activity.

Why kids Helmet Fit matters as much as Certification

A poorly fitted kids helmet provides far less protection in a crash. The helmet must sit level—not tilted back, not pushed forward. It must stay in place under impact. That only happens when the fit system is correctly adjusted before every ride.Every helmet in this range complies with AS/NZS 2063—Australia’s mandatory bicycle helmet standard. Riding without a compliant helmet on any Australian road or shared path is illegal. Review the full mandatory standard requirements if certification detail matters to your decision.The fit system inside the helmet is worth examining before you buy. Dial-adjust retention systems allow precise sizing in centimetres. This system fine-tunes fit in seconds as your child grows. It extends useful helmet life and ensures protection improves with every ride, not just the first.Finding the best kids helmet Australia-wide comes down to two things. Certified construction and a fit system parents can actually use correctly.This is also the honest answer to what makes the safest helmet for kids. There is no single safest kids helmet model. Every helmet sold here meets the same mandatory Australian standard, so the safety difference between them comes down to fit, correct daily adjustment, and whether your child is willing to wear it.

Choosing Kids Bike Helmets by age and riding style

Bike helmets for kids are not interchangeable across age groups. A toddler’s helmet needs deeper rear coverage and lighter weight. A school-age helmet needs ventilation and daily comfort. A trail or skate helmet needs structural protection suited to the falls those disciplines produce.Getting this match right before purchase matters. The most common outcome of a wrong choice is a helmet the child refuses to wear.

• Ages 2–5: toddlers and balance bike riders; Toddler helmets prioritise light weight and full rear head coverage. Younger riders tire of heavy helmets quickly. The buckle and strap system should be manageable by a parent in seconds—not a puzzle to solve at the park gate. Browse our toddler bike helmets for ages 2–5 for options built specifically for this stage.
• Ages 5–8: school-age riders building confidence; This age group logs the most daily helmet hours. School rides, neighbourhood loops, and weekend paths demand a comfortable, well-ventilated helmet kids will actually keep on. Look for a mid-weight shell with a dial-adjust system and proven airflow. View our helmets for ages 5–8 for the full range at this level.
• Ages 9 and up: trail riding, BMX, and independent riders; Older riders have opinions. A bike helmet kids this age are proud of gets worn every ride. That matters more than most parents expect. Style and function have to work together at this stage.

A kids mountain bike helmet at this level should include a visor. Visors deflect low sun, manage trail debris, and block overhanging branches on narrow paths. Without one, trail riding becomes a squinting exercise on every descent.A kids bmx helmet uses a rounder, lower-cut shell. This design handles the backward and sideways falls common in skate parks and pump tracks. A standard road or trail helmet does not offer the same rear and side coverage for park riding.Some helmets at this level include MIPS technology. MIPS stands for Multi-directional Impact Protection System. A rotating liner reduces rotational forces on the brain during an impact. Where MIPS options are available in this range, they are clearly labelled on the individual product page. Shop helmets for ages 9 and up to view the full selection.This is why childrens bicycle helmets are sold in size ranges rather than as a single universal product. Matching the helmet to both the age and the activity is what turns a helmet from an argument into a habit.

How to Measure for a Correct Kids Bicycle Helmet Fit

Sizing by age label alone is the most common fitting mistake. Head circumference—measured in centimetres, is the accurate method. Age labels vary across brands. Circumference does not.Measure your child’s head correctly before purchasing:

• Use a soft tape measure
• Wrap it around the widest point of the head, 2cm above the eyebrows
• Record the measurement in centimetres
• Match it to the brand’s specific size chart, not a generic age guide printed on the box

A correctly fitted helmet sits level on the head. The front edge clears the eyebrows by no more than two finger-widths. Straps form a clean V-shape just below each ear. The chin strap fits snugly, one finger fits underneath, no more.The Raising Children Network’s bike safety guide walks through a practical fit check parents can complete at home. The Better Health Channel’s bicycle safety resource covers riding safety by developmental stage for Australian families. Both are worth reading before the first ride.If you are uncertain about sizing after checking the chart, contact the xchange Sports  team before purchasing. A correct first fit avoids returns for everyone.

When to replace a kids helmet

Replace any kids helmet immediately after a significant impact—even with no visible damage. Helmet foam compresses on impact and does not recover. The outer shell may look intact. The protective foam inside may not be.As a general guide, replace kids’ bike helmets every three to five years. UV exposure, repeated minor knocks, and strap wear all degrade performance over time. If the retention system no longer adjusts to a secure fit, replace the helmet. A head that has grown past the maximum adjustment point needs a new size, not a tighter buckle.A helmet dropped from significant height, off a table, out of a car boot—should be inspected closely before the next ride. When in doubt, replace it. Protection is not worth the risk of compromise.

Accessories that complete every kids riding setup

A helmet covers the head. Knee pads and elbow guards protect the joints most likely to contact the ground in a fall. Gloves reduce palm abrasion in minor tumbles and improve grip in wet riding conditions.Browse the complete bike accessories range to add protective gear to your order. In-stock accessories dispatch together with helmets in a single shipment.For shipping rates and estimated delivery timeframes, visit the shipping and delivery policy page. Flat-rate shipping applies Australia-wide on every order placed through Xchange Sports.Adding kids protective gear at the same time as the helmet means a single flat-rate shipment rather than two separate orders, and it means the full set arrives before the first ride rather than after the first fall.Discover more Helmets at Xchange Sports Australia.