Your best bet is to try some out at a meetup or contest if you can get to one. Otherwise, I’d recommend picking the one that you think looks the coolest and asking for opinions about it to make sure it isn’t a dud - most yoyos on the market right now are stellar.
I would get a Yuuksta if I were you. The YoYo is Simply Amazing, and The Price Only Makes it Better! But If you dont want to go with that, then I would Suggest a Skyline.
The YYJ Axiom is pretty small. It is my favorite all metal yoyo. It sleeps very long, and is very smooth. I wrote a review on it if you want to check that out: