Basketball Size Guide

Find the right basketball size based on age, gender, and playing environment.

Quick Reference by Age
Age Group Boys Girls
Ages 4 & Under Size 3 (22.5") Size 3 (22.5")
Ages 5-8 Size 5 (27.5") Size 5 (27.5")
Ages 9-11 Size 6 (28.5") Size 6 (28.5")
Ages 12-14 Size 7 (29.5") Size 6 (28.5")
Grades 9-12 Size 7 (29.5") Size 6 (28.5")
Choosing the Right Ball
Choose the Right Size

Playing with the wrong size ball can have long-term negative effects on technique. Use the age chart as your starting point.

Consider Your Court

Indoor courts require softer construction. Outdoor play demands durability to withstand rough surfaces and weather.

Match the Material

Rubber for outdoor, composite for versatility, leather for premium indoor play.

Basketball Sizes Explained
7
Size 7 - Official Size
29.5" 22 oz

Standard ball size for men's professional basketball

Used by: Men's professional (NBA), college, high school, and travel leagues

6
Size 6 - Intermediate
28.5" 20 oz

Standard ball size for women's professional basketball and youth leagues

Used by: Women's professional (WNBA, FIBA 3x3), women's college/high school, and youth leagues ages 9+

5
Size 5 - Youth
27.5" 14-16 oz

Most popular ball size for youth leagues

Used by: Youth leagues for players ages 8 and under

3
Size 3 - Mini
22.5" 10 oz

Best basketball for young children

Used by: Children ages 4 and under, or commemorative gift

Basketball Materials
Material Advantages Best For
Rubber
Street Basketball
  • Durable enough for outdoor use
  • Excellent grip, even in rain/dirt
  • Inexpensive
  • Available in many colors and patterns
 Street basketball and casual outdoor play
Composite
Synthetic Basketball
  • Appropriate for indoor/outdoor use
  • More durable than leather
  • Most popular basketball type
  • Great grip and feel
 Most indoor and indoor/outdoor play
Leather
Premium/Game Ball
  • Most premium material (genuine Horween leather)
  • Superior grip after break-in period
  • Official NBA game ball material
 Indoor competitive play only
Indoor vs Outdoor Basketballs
Indoor Courts
  • Composite or leather construction
  • Softer feel, optimized for polished wood
  • Won't damage delicate playing surfaces
  • Better grip and control
Outdoor Courts
  • Rubber or durable composite
  • Withstands abrasive surfaces
  • Retains playability in weather
  • Handles metal nets and rough play