size

Hello, this is my first every post (yay!). I was wondering about what size cube to get. I'm 11 so I have small hands. My hand is exactly 6 inches from my palm to the end of my middle finger. I currently use a 56mm Zhanchi and the 57mm Fansgshi. I think I need a smaller cube such as 45-53mm but...

i am planning to buy a dayan v zhanchi for speed cubing. i'm stuck with different sizes of zhanchi.my question is whether increase or decrease in size give us an advantage. also what is ideal for one handed solves ? :confused::tu

Here's a 3-cube-relay done with three different sizes of zhanchi (i don't have a 50mm)

I've got a Dayan Guhong (Lone goose) and an Alpha V but i ordered 1 set of normal stickers (cubesmith) and one set of the smaller size. which size should i put on which cube? *EDIT* basically what im asking is which looks better