Free tool
Racquet size calculator
The right junior racquet length from your child's height, or from age if you do not know the height. With the ball stage and court that usually go with it.
Junior racquet size calculator: enter your child's height (or age) to get the right racquet length, from 19 to 27 inches, plus the ball color and court size. For example, a child 45–49 inches tall usually fits a 23-inch racquet.
Enter a height or an age
We match height to the published size bands, then show the ball stage most kids that age play.
Junior racquet size chart
| Length | Height | Typical ages |
|---|---|---|
| 19 in | under 40 in (102 cm) | 2–4 |
| 21 in | 40–44 in (102–114 cm) | 4–6 |
| 23 in | 45–49 in (114–127 cm) | 6–8 |
| 25 in | 50–55 in (127–142 cm) | 9–10 |
| 26 in | 56–58 in (142–150 cm) | 10–12 |
| 27 in | 59 in (150 cm) and up | 12+ |
Training aid: the Functional Tennis Saber sweet-spot racquet comes in a 23" Junior and two 25" sizes.
Ball stages and courts
- Red ball: 36 × 18 ft court, net 2 ft 9 in, about 75% slower than a yellow ball.
- Orange ball: 60 × 21 ft court (60 × 27 ft for doubles), about 50% slower.
- Green ball: full 78 × 27 ft court (78 × 36 ft for doubles), about 25% slower.
- Yellow ball: full 78 × 27 ft court (78 × 36 ft for doubles), standard ball.
The age for each stage is a typical path, not a rule. USTA sections set their own ages, and kids move up by skill. For more on equipment for young beginners, read what racquet to choose for a 6-year-old.
Sources
- Wilson: Junior tennis rackets (size by age)
- HEAD Speed 21 Junior specs (Tennis Warehouse)
- HEAD Speed 23 Junior specs (Tennis Warehouse)
- HEAD Speed 25 Junior specs (Tennis Warehouse)
- Tennis Companion: Kids racquet sizing chart
- Central Sports: Junior racket size guide (cm)
- USTA: Ball and court sizes for kids
- USTA: Find the right tennis level
- USTA Midwest: Youth progression
Checked October 12, 2026. Age lengths follow the Wilson chart; height bands follow HEAD's published specs for 21–25 inches. The 19, 26 and 27 inch bands come from independent sizing charts, as we found no official USTA chart.
Questions parents ask
Should I size a junior racquet by height or by age?
By height. Age charts are built on average heights, and Wilson notes that a child who is tall or short for their age should take that into account. Use age only when you do not know the height.
How do I check a racquet fits?
Have your child stand straight with the racquet held at their side, arm relaxed. If the head touches the floor, it is too long.
Should I buy a bigger racquet so it lasts longer?
No. A racquet that is too long or heavy makes contact harder and slows learning. Junior racquets are cheap; size up when your child grows into the next height band.
Why do brand charts disagree?
Each brand publishes its own chart. For example, HEAD lists its 21 inch junior for ages 4–5, while Wilson lists 21 inches for ages 5–6. The height bands agree more closely, which is why height comes first here.