what size pot for lowryder?

I'm on my first grow and decided to go with the lowryder cross masterlow for my first grow.

I've got them in plastic cups right now but they are going to need to be repotted soon I think and I was just wondering what size pot I should go with since these don't get very big... Also I saw the post down below about grow bags are those good at all?

I would use at least a 2 gallon size pot or a 3 gallon about 3/4 full. I don't know about the grow bags I got a pack of them but have yet to use them.

S_a_H