Racket
Length by age and player height.
Read source-reviewed guideTennis
Junior tennis rackets are described by length rather than adult racket head size. A maker's age bands narrow the starting choices, while the child's height, experience, and control can change the length to try. USTA programs use red, orange, and green balls with appropriate courts to support learning. Ask the coach which stage the lessons use, compare the exact racket's weight and grip, and try controlled strokes before moving up. A larger frame bought for growth can be harder to handle even when its age label seems appropriate.

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Choose the equipment
Length by age and player height.
Read source-reviewed guideTennis buying path
Start with the exact maker's junior guidance, adjust for player height and experience, then compare practice strokes with the coach. Racket length and weight both need to be manageable.
Most beginner programs use red, orange, or green-dot transition balls that are slower and lower-bouncing than yellow balls. Confirm which ball your child's program uses before buying rackets or extra balls.
Holding an adult racket does not show that the player controls its length and weight through practice strokes. Compare an appropriate junior frame and ask the coach before making the adult-frame transition.
Pick the sport and gear, then add the measurements that matter. You'll get a practical starting range, fit checks, and what to avoid.