It fits any glass bottle, with a narrow opening, perfectly! AND. These fits like corset, shapes your waist and actually works like the sauna waist sauna trainers. It would be better if it plugged in on the underside, with a rubber plug for moisture control if its not being used. 5 and have wide feet, so I went with a size 8 on these. You can only get a good hour to an hour and a half of dancing out of them or a good hour or so walking around. These fit great with sunglasses, a ball cap, or on their own. Upon receiving these shoes they fit well and were comfortable. I weigh over 300 pounds and am hard on shoes. Bought this for my Harley softail custom.