I have yet to see a post where my 11YO is not smaller then the 8 or 9 year old.
Exactly. My DD is average size for a woman according to all of the charts, but a shrimp on the SB field.
I have yet to see a post where my 11YO is not smaller then the 8 or 9 year old.
Ouch. My skilled BIG second years 10U-A players swing 31/21 at most and some of them have considerable height and weight over the OP's player. My DD swings a 30/18 most of the time.
I also spent WAY too much time over the past 4 years teaching coach pitch players how to swing a bat against live pitchers and yelling at coach pitchers to throw hard and flat so the transition to hitting live pitching is not going to be so painful. I am SO sick of saying 'At 10U the pitcher doesn't want you to hit the ball'
If I was you I would buy her a 30/20 bat and start throwing about 40mph at her and get her batting instruction to get rid of the longer, drop down swing. Get a good swing behind a big stronger player and she'll hit a mile. She'll hit the slower pitchers in 10U with her current swing but the moment she sees a girl who can either throw it hard or knows how to locate her pitchers she is going to have real issues.