After reading through the reviews, I ordered a half-size larger and held my breath waiting for them to arrive. A little concerned by how small they appeared in box, but I put them on hoping that looks can be deceiving. They felt a tight with socks on and snug without socks. Twisted and slid on the carpet throughout the living room and hallway to make sure they weren't going to grab. Satisfied that I wouldn't hurt my knees, I tried them out with a 40-minute Zumba workout (with socks on). Final Assessment: Perfect! I was able to move through the workout with ease. Shoes became comfortable during use. Tried them on again without socks and were a perfect fit. Next workout I did without socks was surprisingly comfortable. After a week's worth of workouts, they're still comfortable and do not show signs of wear-and-tear. I've used these shoes for indoor workouts only. I've reassigned my "rejected-from-Zumba" sneakers to outdoor use, errands, etc.