Size 13 purchased - fits if you wear socks on the thicker side - only the standard thickness (regular) will result in the shoe being a little loose, not so much messing things up, but you will notice it when i do leg exercises at the gym. The tongue of the shoe tends to slide to the outside of each shoe. The small yellow tab should be used as part of the lace pattern, otherwise the shoes will not fit as securely as you would expect. Add another pair of plantar pads and comfort doubles slightly. Still, fit, feel and looks are a plus when you're starting out. With over 15 different styles for use in the gym (or just going to the movies or playing ball) this shoe is the best at comparable prices. As a last resort I would say that 5*** would be acceptable. Highly recommend - just make sure you get the right size (a little big). NOTE 1 Just bought a second pair - they are so good. Black and red this time. Still great quality.