What length of string do you use when you are looping

What length of string do you use when looping
I use a 25 inch string

Ground to bottom of belt buckle

31 inches

Ground to bottom of pocket. I’m finding the shorter works better for me.

I actually use the default size of yye poly.

Yah i find it really helps to have the short string length to help control the yoyo

Longer string makes the yoyo want to loop down, shorter makes it want to loop up. Best to find the spot right in the middle.