The Five Rugby Ball Sizes
World Rugby specifies five sizes of rugby ball, each designed for a specific age group and playing level. Choosing the right size is important — too large and young players struggle to grip and pass correctly; too small and skill development suffers at higher levels.
Size Guide by Age
| Size | Age Group | Circumference | Weight |
|---|---|---|---|
| Size 3 | Under 7s to Under 9s | 45–50cm | 280–300g |
| Size 4 | Under 10s to Under 14s | 55–58cm | 390–430g |
| Size 5 | Under 15s and above / Adult | 58–62cm | 410–460g |
| Mini / Midi | Any age — training aid | Varies | Varies |
Size 3 Balls
Designed for the youngest rugby players, size 3 balls are smaller and lighter — easy for small hands to grip and throw. Used in mini rugby (under-7s to under-9s) across the UK. Also popular as promotional and novelty items for clubs.
Size 4 Balls
The standard ball for youth rugby from under-10s through to under-14s. Larger than a size 3 but still appropriately sized for developing players who are learning to pass and kick correctly. Widely used in school rugby programmes.
Size 5 Balls
The full-size rugby ball used at under-15 level and above, including all adult club, regional, and professional rugby. The size 5 is the standard match ball for Rugby Union and Rugby League worldwide. When buying for a senior club, always choose size 5.
Match Balls vs Training Balls
Match Balls
Match balls are made to the highest tolerances for consistent shape, grip, and flight. They use premium leather or high-grade synthetic leather and meet World Rugby approval requirements for competitive play. Match balls typically feature distinctive colour schemes and are used for official matches and photo opportunities.
Training Balls
Training balls are more durable and significantly more affordable than match balls. Built to withstand high volumes of use on any surface, including grass, astroturf, and indoor courts. A club should have significantly more training balls than match balls — aim for at least one ball per two players in a training session.
Inflation and Maintenance
Correct inflation is essential for consistent playing characteristics. A properly inflated rugby ball should have a pressure of approximately 65–68kPa (9.4–9.9psi). Check and adjust pressure before every training session and match. Always use a proper ball pump with a pressure gauge.
Store balls away from direct sunlight when not in use — UV exposure degrades the rubber bladder over time.
Choosing a Training Aid Ball
Mini balls (smaller than size 3), oddly-shaped reaction balls, and weighted training balls all have a place in rugby coaching. Mini balls are excellent for games and drills with younger players. Reaction balls improve handling skills and spatial awareness.
Browse our full range of rugby balls — all sizes, all budgets.