I bought a mobility tools velcro weightlifting belt some months ago after using a friend's at the gym. His was a medium, fitted well with surplus should I lose any weight it would still provide decent support. On taking delivery of a medium I was initially very pleased however I did notice that to get decent support the belt was maxed out, ie there was no more room, not at all like my friends medium. If I lost any weight it would be useless. I (belatedly) contacted mobility tools to let them know. I told them the belt was great quality but the sizing differs from a verified buyer. They asked for the details of Aaron's who's belt I had tried. I passed them with his permission. After this I heard nothing and it has been a couple of months. So, to cut a long story short I wouldn't buy from them again, not just because of the sizing issue but really due to the fact that when I pointed it out they didn't seem to care. I also left a review on their website bit bizarrely it hasn't been published... who'd have thought it.