Basketball buying guide
Basketball Size Guide: Choose Size 5, 6, or 7
A basketball purchase starts with two details: the size used by the player's team and the court where the ball will spend most of its time. Settle those before comparing covers, colors, or professional-league graphics. The same model name can appear on several sizes.
Start with the short answer
The short answer
USA Basketball and the NBA recommend size 5, 27.5 inches, for ages 7–8; size 6, 28.5 inches, for ages 9–11; and size 6 for girls or size 7, 29.5 inches, for boys at ages 12–14 and grades 9–12. Confirm your league's requirement before ordering.
Research-based buying guidance. Some shopping links may earn a commission. How we use shopping links.
In this guide
Use the team requirement first
The table follows USA Basketball's equipment recommendations. It is a starting reference for a US youth program, rather than proof that every local competition follows the same rules. Send a gift buyer both the size number and circumference; an order for a “junior basketball” is less precise.
| Playing group | Recommended ball | Shopping check |
|---|---|---|
| Ages 7–8, boys and girls | Size 5 · 27.5 inches | Ask the program about younger beginners |
| Ages 9–11, boys and girls | Size 6 · 28.5 inches | Confirm the current age division |
| Ages 12–14 and grades 9–12, girls | Size 6 · 28.5 inches | Match the competition's rules |
| Ages 12–14 and grades 9–12, boys | Size 7 · 29.5 inches | Check the selected product variant |
Choose the surface separately from the size
A size number tells you nothing about where a ball should be used. Wilson identifies the Evolution as an indoor ball. Spalding identifies the Street as an outdoor rubber ball and lists all three common circumferences. A suitable size in an unsuitable cover still leaves you with the wrong purchase.
For driveway practice, filter for outdoor or explicitly indoor/outdoor use. For a ball kept at the gym, an indoor model can make sense. If the player moves between both settings, decide whether one dual-surface ball or separate indoor and outdoor balls fits the household's routine.
Check what is actually in the cart
Open the size selector even when a search result shows the right circumference. Product photography may show a different size or color from the selected variant. Check the size again in the cart and order confirmation, especially when a retailer switches to an available option after a color changes.
Look for a pump and gauge already in the equipment bag before buying accessories. Follow the pressure printed on the particular ball and its manufacturer instructions. A ball that feels unusually soft should prompt a pressure check, rather than an immediate conclusion that its size is wrong.
- Write down the size number, circumference, and intended court.
- Check whether the team supplies match balls or expects personal practice balls.
- Keep a gift receipt until the player confirms the size and surface.
Buy for a defined season
Ask the coach before buying a larger ball for an anticipated age-group move. The next program may start later than the gift occasion, and a smaller sibling may need a different size now. Recording the team, season, and ball specification gives the purchase a useful reference when equipment gets shared.
Once the required size is known, compare current retailer availability and the complete delivered cost. A team-colored design is optional; the correct size and cover determine whether the ball can serve its intended practice job.
Options to explore
A confirmed size for driveway or park use
Spalding Street Outdoor Basketball
The manufacturer lists 27.5-, 28.5-, and 29.5-inch options with an outdoor rubber cover.
Before you buy: Select the required circumference; colors and availability can vary.
Explore in Gear Playbook catalog ↗A ball kept for indoor courts
Wilson Evolution Game Basketball
Wilson specifies indoor use for this composite-covered model.
Before you buy: Confirm the required size and keep the ball out of the outdoor practice rotation.
Explore in Gear Playbook catalog ↗Sources & approach
We checked the following manufacturer, retailer, and governing-body references on . This guide does not claim hands-on testing. Confirm the selected model, size, current price, and return terms at the retailer.
