What size bike to get for a 6 year old

For a 6-year-old, start by checking a 16-inch bike, then choose by measured height and fit. A 14-inch or 18-inch bike may fit instead.

The short answer by height

Age six falls across several wheel-size ranges, so age alone cannot settle the choice. Measure your child without shoes, then use these XBikes starting points:

The ranges overlap deliberately. If your child is 44 inches tall, for example, both 14-inch and 16-inch starting ranges include that height. The correct decision then comes from inseam clearance, reach, brake control and confidence during a real fit check.

Measure height and inseam first

For height, have the child stand upright against a wall without shoes. Keep the head level, mark the top of the head, and measure from the floor to the mark.

For inseam, place a book firmly but comfortably between the legs, with its spine level like a bicycle saddle. Measure from the floor to the top edge of the book. Record both measurements and bring them when comparing bicycles.

Wheel size is only a category label; it does not tell you the frame’s exact stand-over height or reach. Compare the measured inseam with the specifications and fitting guidance in the exact bicycle’s manual. If those details are unavailable or unclear, ask a qualified bicycle mechanic to check the fit.

What the child should do during the fit check

The American Academy of Pediatrics advises having the child try the bicycle and not buying an oversized bike merely for future growth. During the trial, look for calm, repeatable control rather than asking whether the child can manage the bike for a few seconds.

1. Check stand-over: The child should be able to straddle the bicycle without the frame pressing into the body. Use the exact product manual’s clearance guidance rather than inventing a universal number.
2. Check starting and stopping: The rider should get on, set off and stop without the bicycle pulling them off balance.
3. Check reach: Seated normally, the child should reach the handlebar without stretching, locking the arms or leaning excessively.
4. Check brake control: The child must be able to reach and operate the fitted braking controls reliably. Confirm adjustment procedures in the manual or with a qualified bicycle mechanic.
5. Check confidence: Choose the size on which the child looks controlled and comfortable now, especially if deciding between overlapping ranges.

How the supplied XBikes options compare

The two catalog options are useful because they provide 14-inch and 16-inch comparison points within the common height ranges for a six-year-old, plus one 20-inch option for riders whose measured height and individual fit support it. Neither product offers an 18-inch SKU, so they cannot substitute for an 18-inch bike when that is the appropriate fit.

• XJD Kids Bike for Girls – Pink, 12/14/16/20 Inch with Training Wheels

  Offers 14-inch and 16-inch comparison options relevant to many six-year-olds, plus a 20-inch label for riders whose measured height and individual fit support that size.

• XJD Pink Girls' Bike – Kids 12/14/16 Inch Training Wheel Bicycle

  Provides 14-inch and 16-inch training-wheel bicycle options to compare against the child’s measured height, inseam, reach, brake control and current confidence.

XJD Kids Bike for Girls – Pink, 12/14/16/20 Inch with Training Wheels is listed in the Training Wheel Bikes category and has 12 Inch, 14 Inch, 16 Inch and 20 Inch SKU labels. For this question, compare its 14-inch and 16-inch versions first; consider the 20-inch label only when the child is at least within the 48–60 inch starting range and passes every fit check.

XJD Pink Girls' Bike – Kids 12/14/16 Inch Training Wheel Bicycle is also listed in the Training Wheel Bikes category. Its available labels are 12 Inch, 14 Inch and 16 Inch, making the 14-inch and 16-inch versions relevant comparison choices. Wording in the product title is a catalog label, not proof that a particular child fits.

Do not infer frame dimensions, brake type, load limit, assembly method or compatibility from wheel size. Follow the manual for the exact selected SKU, or use a qualified bicycle mechanic.

When 14, 16, 18 or 20 inches makes sense

• Start with 14 inches when the child is within 37–45 inches and the 16-inch comparison feels too tall, long or difficult to control.
• Start with 16 inches when the child is within 40–48 inches; it is the most direct age-six starting point, subject to the complete fit check.
• Try 18 inches when the child is within 43–52 inches and can comfortably control the larger comparison. The supplied products do not include this exact size.
• Try 20 inches cautiously only from 48 inches of rider height and when reach, stand-over, brakes and confidence all fit now—not as a purchase for future growth.

Make the final decision

Measure height and inseam, select the matching starting range, and have your child try the actual bicycle. If two sizes overlap, choose the one that permits better stand-over, easier reach, dependable brake use and more confident control today.

Before riding, use a properly fitting bicycle helmet. The U.S. Consumer Product Safety Commission says it should sit level, fit correctly and use its straps according to the helmet manufacturer’s instructions. For your six-year-old, begin with the 16-inch comparison, move to 14 or 18 inches if measurements and control point there, and consider 20 inches only after the child reaches its height range and passes the fit check.