Rugby balls come in three sizes, and roughly nine out of ten parents buying one for a child at home end up with a size 5 because it is the one on the shelf at eye level. It is the right ball for a fifteen-year-old and the wrong ball for a seven-year-old, and the difference shows up fast in a child's passing.
These are the questions we get asked at the counter, in the order we get asked them.
What sizes do rugby balls actually come in?
Three, for practical purposes: size 3, size 4 and size 5. Size 5 is the adult ball. You will also see midi and mini balls sold as toys or beach balls, which are not the same thing and are not built to be kicked or passed properly.
Which size does my child need?
Standard RFU age-grade guidance works out roughly as follows. Treat it as general guidance rather than a rule.
| Ball size | Age grade (roughly) | School years (roughly) |
|---|---|---|
| Size 3 | Under 7 to Under 9 | Reception to Year 4 |
| Size 4 | Under 10 to Under 14 | Year 5 to Year 9 |
| Size 5 | Under 15 and above, including adult | Year 10 upwards |
The jump from size 4 to size 5 is the one that lands hardest, because it usually coincides with the move up to full contact and a longer season. Size 4 covers a wide age band on purpose — it spans the years when children grow at wildly different rates, and it is deliberately generous at both ends so that a small Year 8 and a tall Year 6 can use the same ball without either being disadvantaged.
Note also that sizing is about hand span and not about strength. A physically big nine-year-old still has a nine-year-old's hands, and putting them on a size 4 early does nothing for them.
Why does my club's list say something different?
Because clubs and schools set their own requirements, and they are entitled to. Some age-grade sections hold a group on size 4 for an extra year because the squad is small for its age. Some independent schools run their own sizing for internal fixtures. Local leagues occasionally differ from the national picture.
So before you buy, check the club's kit list or ask the age-grade coach. A two-minute message saves a return, and the coach would far rather answer that question than deal with fifteen different balls at training.
The other reason lists differ is that many clubs distinguish between the ball used in fixtures and the ball children are asked to bring to training. It is not unusual for a section to play with the age-grade size and hand out a mix of sizes for skills work on purpose, so that players get used to handling both.
Is it different for girls' age grades?
Generally no — the same size-by-age-grade pattern applies across boys' and girls' age-grade rugby. As above, individual competitions and schools sometimes set their own requirement, so confirm locally before spending.
What about touch, tag and messing about in the garden?
For tag and touch, size by age exactly as above — the handling skills are the whole point, so the ball needs to fit the hands. For unstructured practice at home, a slightly softer or smaller ball is fine and often better, because a child who can actually palm the ball will spin it properly rather than learning to throw it two-handed like a shot put.
One genuinely useful trick: buy the correct size for age, and keep an older, softer ball for indoor and garden work. Grip technique transfers. Bad two-handed habits also transfer, which is the problem with going too big too early.
Do I need a match ball, or will a trainer do?
For a child practising at home or a club buying in volume for sessions, a training ball is the right call. Match balls are built to hold their shape and pressure through eighty minutes of kicking and are priced accordingly. A trainer in the correct size will teach a child everything a match ball would, and survive being left out in the rain rather better.
Whichever you buy, inflate it to the pressure printed on the ball itself and check it every few weeks. An underinflated ball is soft in the hand, wobbles in flight and quietly teaches a child to compensate for it. A cheap pump with a gauge on it is one of the better ten-pound purchases in junior sport.
The place a match ball does earn its keep is with an older age-grade player doing serious kicking practice, where the flight needs to match what they will use in a fixture. Below about Under 15, it makes very little difference to how a child develops.
How do I know the ball is too big?
Three checks, none of which need a coaching badge.
- The grip test. The child should be able to spread one hand across the seam and hold the ball out at arm's length without the other hand supporting it. If they cannot, it is too big.
- The pass test. Ask for a short pass off each hand. If the ball has to be cradled into the chest first and pushed out two-handed, the ball is doing the coaching, and it is teaching the wrong thing.
- The kick test. A ball that is too big for a child's foot will slice sideways off a punt no matter how good the technique is.
The temptation with a child who is about to change age grade is to buy the bigger size early and let them grow into it. Resist it for balls in a way you would not need to for, say, a training top. A season of passing an oversized ball builds a two-handed habit that takes a long time to unpick, and the saving is small.
If you are unsure, size for the age grade the child is in right now, not the one they will move into next September.
You will find balls across all three sizes in our sports balls range, with the wider kit list in the rugby section. Clubs buying a set of training balls for a squad can talk to us directly rather than ordering through the website.