Hestra makes great durable high quality gloves. You might check out their USA website for further info, if you are interested. If you are not sure of the sizing I agree that you are better passing on the deal though.
There's a sizing chart on there, easy to measure your fingertips to your wrist, and determine which one is your size. I picked up an armful of good goretex gloves in Oz a while back, so can't justify getting them. pity.