The Distortion gloves have come up a lot smaller than we expected... So, if you would normally order a Medium then order a Large. If you would normally order a Large then order an Extra Large. And if you order an Extra Large order an XXL. The Small I would say are Kids size or very small hands and the Medium is a Small.
The Planet Eclipse Distortion Gloves are newer, so they should be commonly available, both new and used.