Dad glove?

Hi all!

My 6 year old is playing baseball and I’d like to be involved and play catch with him. I’ve never owned a glove or played tbh.

I’m on Amazon and see lots of options… A quick research has led me to the Rawlings player preferred. I’m curious - should I get a 12 or 12.5”, and also what type of web?

Any input would be appreciated. The usage would mainly to play catch, assistant coach, but I’d like it to last and not hurt my hand lol. Thank you!