My running shoe size is usually a 5, but I ordered black/onyx/silver in size 6 and the fit is just right. I tried size 5 in coral and it felt tight across the toe box and coral was neon orange (I like colors but this is blinding). I went out for a walk in these and they felt cushioned and bouncy.  I will jog in them tomorrow and I feel they will hold up for my 1 hour and 40 minute jog outdoors. I was able to buy these at a great price on April 13th.