OK, so it suggests about 2/3 of extra space between toes and front of shoe, which for me meant going a full size up. You want this space.<br /><br />I am not a fan of red and purple; I like neutrals more. But who cares? The ability to move my toes when I run instantly trumps the ugly color.<br /><br />I just finished my first run in these shoes and for the first time in a long while it was my lungs that tired before my legs. I haven't felt any of my usual troubles (ankle and knee pain and weakness) and I even took an extra walk after with my dog. I do not find these that comfortable to walk in. Actually I find them a bit awkward for walking.<br /><br />Running, however, as a toe-first runner, is amazing.