What Size Basketball Does a Kid Need? Ball Size and Hoop Height by Age

A ball that is too big for a young player's hands changes how they shoot. They cannot get a hand under it, so they push it from the chest or throw it with both arms, and the habit tends to outlast the growth spurt. It is one of the easier problems in youth basketball to avoid, because the fix is buying the right ball.

The short answer: ball size and hoop height by age

• Ages 5 to 6: size 5 ball (27.5 inches around). Hoop at 8 ft (2.4 m), and it can go as low as 6 ft (1.8 m).
• Ages 7 to 8: size 5 ball (27.5 inches). Hoop at 8 ft (2.4 m).
• Ages 9 to 11: size 6 ball (28.5 inches). Hoop at 9 ft (2.7 m).
• Ages 12 to 14: size 6 for girls (28.5 inches), size 7 for boys (29.5 inches). Hoop at the full 10 ft (3.05 m).
• Ages 15 to 18: the same as 12 to 14. Size 6 for girls, size 7 for boys, 10 ft (3.05 m) hoop.

Those numbers come from Canada Basketball's Youth Playing Guidelines (adapted from USA Basketball), which are written to line up with Canada Basketball's long-term development model. USA Basketball and the NBA announced the same ball sizes and hoop heights for ages 7 to 11 in 2018. The measurement in brackets is the ball's circumference, which is how the sizes are defined.

Why a smaller ball and a lower hoop

The guidelines give two reasons. A smaller ball suits the size of a child's hand and their skill level, so they can control it. A lower basket for players 11 and under lets them develop proper shooting form and make more of their shots. The same guidelines move the free throw line in to 14 feet for those ages and count every basket as two points, so nobody is rewarded for launching from too far out.

You can see why from the stands. A nine-year-old shooting a full-size ball at a ten-foot rim has to throw it with their whole body to reach. The shot they build to get there is not one they will keep, and unlearning it later takes longer than learning it properly the first time.

Mini-basketball for the youngest players

Canada Basketball's Mini-Basket rules go smaller again for children just starting out. As Basketball Manitoba summarised when the rulebook was released, the 3-on-3 version uses a size 3 ball and an 8 ft (2.4 m) hoop on a half court, and the 4-on-4 version uses a size 5 ball and a 9 ft (2.7 m) hoop. That summary does not attach ages to each format, so think of it as the shape of a first game rather than a rule for a particular birthday.

Check what your kid's league actually uses

All of this is guidance, not law. Canada Basketball's guidelines say not every organisation or facility can follow them, because plenty of gym baskets cannot be lowered. Your child's school, league or club decides what ball the games use. Before you buy, ask the coach. If Saturday games are played with a size 6, practising at home with a size 6 makes sense even if the chart says otherwise.

If your kid is between sizes

Ages are a starting point. A quick check: from close to the rim, can they shoot the ball with one hand, elbow under the ball, and have it roll off their fingertips? If they have to push it from the chest, or need both hands just to reach the rim, the ball is too big or the hoop is too high. Move up a size when the shot looks the same with the bigger ball as it did with the smaller one.

Indoor ball or outdoor ball

Rubber balls are made for pavement and keep their grip outside. Composite and leather covers are made for gym floors and wear out quickly on a driveway. For most families the first ball is a rubber one in the right size for the driveway, with an indoor ball later if their kid is playing a lot in a gym.

The driveway hoop

If you are buying a hoop, one with an adjustable height lets you follow the same chart at home: 8 ft (2.4 m) for younger kids, 9 ft (2.7 m) for ages 9 to 11, then up to 10 ft (3.05 m) as they grow. Our sister site SixSevenBall, also built by Launch League, has a buying guide to home basketball hoops that covers adjustable systems.

Then put the ball to use. We wrote up basketball drills a kid can do at home, including ones that need no hoop at all.

Where we fit in

Shooting form is one of the things we work on in private and small-group training for ages 8 to 18 in Chatham-Kent. If your kid has built a shot around a ball that was too big, that is a fixable problem, and it is easier to fix sooner.

Holiday Hoops, our Christmas break camp for ages 7 to 13, runs December 21 to 23 and December 28 to 30, 2026, and every camper takes home their own Chatham Kings basketball. Details are on our camps page.