Start by watching this video:
Useful Link for Racket Sizes: Junior & Kids Tennis Rackets - Tennisnuts.com
Sports Direct Racket Link: Junior Tennis Rackets | Babolat, Prince, HEAD | Sports Direct
For players playing more regularly or in our Tennislessons4u teams you may want a racket upgrade. Speak to your coach who can direct you to the best racket for your age and ability.