What Is the Normal Football Size? Sizes 3, 4, and 5 Explained
Adult football is played with a Size 5 ball (68-70cm circumference, 410-450g). Youth uses Size 4 (U9-U13) and Size 3 (U6-U8). We cover all sizes and the IFAB rules.
The standard adult football is a Size 5 ball: 68-70cm in circumference, weighing 410-450g, inflated to 0.6-1.1 atmospheres. These are the IFAB-prescribed specifications for senior 11-a-side football worldwide. Youth football uses smaller balls: Size 4 for U9-U13 and Size 3 for U6-U8.
Football sizes by age group
- Size 5 (adult / U14+). 68-70cm circumference, 410-450g. Standard senior 11-a-side.
- Size 4 (U9-U13). 63.5-66cm circumference, 350-390g.
- Size 3 (U6-U8). 58-61cm circumference, 312-340g.
- Size 1 / 2. Skill / training balls; not used in matches.
IFAB Law 2 specifications
- Spherical. The ball must be spherical.
- Material. Leather or other suitable material (most modern balls use synthetic leather + butyl bladder).
- Pressure. 0.6-1.1 atmospheres (8.5-15.6 psi) at sea level.
- Markings. Manufacturer logo + competition logo permitted; no inappropriate slogans.
- Match ball replacement. Referee approves replacement balls; play does not stop unnecessarily.
Frequently asked questions
- What is the normal football size?
- The standard adult football is a Size 5 ball: 68-70cm in circumference, weighing 410-450g, inflated to 0.6-1.1 atmospheres. These are the IFAB-prescribed specifications for senior 11-a-side football worldwide. Youth uses smaller sizes (Size 4 for U9-U13, Size 3 for U6-U8).
- What size football do U10s use?
- U9 to U13 typically use a Size 4 football (63.5-66cm circumference, 350-390g). U6-U8 use Size 3 (58-61cm, 312-340g). Some leagues vary the cutoff; check your local FA or league guidance.
- How heavy is a Size 5 football?
- A Size 5 football (adult standard) weighs 410-450 grams per IFAB Law 2 specifications. Inflation pressure is 0.6-1.1 atmospheres (8.5-15.6 psi). Modern match balls are typically synthetic leather with butyl bladders.
References
- IFAB Law 2 — The Ball — IFAB
- Adidas — Football Sizes — Adidas
- Forza Goal — Size Guide — Forza Goal
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