I've had a Strength Shop 4" wide 10mm double buckle belt for ten years and it's still going strong, but I've always found that it pinched a bit in the bottom position of Squats and Deadlifts, so finally decided to order the Weightlifting belt. My old belt is L size, for which the size guide says 30-38", whereas on this belt it says that M size is 30-38", so I bought M. I wear the old belt on the 4th hole and this one on the 3rd, so I can vouch for the size guide being pretty accurate. It's a fantastic belt, beautifully well made, great support, comfortable, feels and looks every bit as solid and durable as my old belt. The narrower front width feels so much better when squatting. I wish I'd bought it years ago. Strangely, when I tie the old belt starting with the buckle on the left & pulling the belt through with my left hand, the logo is upside down but on this weightlifting belt it's the correct way up. Not sure whether that's a happy accident or an intentional design change. Another great product from Strength Shop - very happy!