My 10 year old daughter is catching for a travel team. I need to get her a catcher's mitt. She is a lefty and I can't find one anywhere to let her get the feel for it. I have seen a ton on the internet but have no idea what brand or size she will need. I assume she will need a youth size. Right now she is wearing her glove with a sponge in it. I would appreciate any advice. Thanks!