I have big hands, and with the help of the online measurement guide and my hands size (9 inches), I ordered the Large variant. I had to then get a size exchange done and go for the XL version, which again would just fit my hand.
The glove quality, other than the fitting, is pretty good for the price range. It helps keep your palms not be affected from exercise and also provides a soft upper side to wipe sweat off of. Keep in mind the size criteria and go for one higher than what the instructions say, and you will have your money well spent.