Perlite size?

[rudylr]

I can get on amazon 50 liter bags of perlite that says on the bag 1/4 to 1/2 inch size for about 35 bucks. I can also get 100 liter bags for about the same price but they don't give the size. They both say super course. A couple reviews on the 100 liter bag says its about 1/8 to 1/4 inch. I've heard bigger is better but your going to get twice as much of the smaller stuff. Whats the best way to go here? Thanks