I am a size 8 in athletic shoes consistently, but in heels I find the need to size down. Not in these! I went with my regular shoes size, got the 8, and am in love! I haven't worn heels since knee surgery and am trying to get back into them, so I needed comfy in my life. I wore these day 1 for 10 hours straight on a hard classroom floor and then chasing small children throughout a gym without a notice. It was AMAZING! I am sold and looking at other colors now. Once thing to note, I wear these with ultra low black athletic socks and pull the top of the sock just above the lip of the shoe. It is unnoticeable, but without that I noticed a bit of rubbing on the back of my ankle.