My torso measures right at 20". Should I...
My torso measures right at 20". Should I go up to a large or try a medium?
Hey there, I would go large, it will give you more interior space to pack extra stuff...
It would be bigger inside but when between sizes like you are, the rule of thumb is to pick the smaller size to get a better fit. I'd worry more about the fit than a couple of cubic inches.