I absolutely love these clogs.  A co-worker recomended them to me 4 years ago and it's all I practically where (in a variety of colors of course).  I'm able to walk an 8 hour trade show with no problems, they are great for travel - easy on and easy off for the security lines.  The sizing is consistent.  First time I wore a pair I thought they were a tiny bit loose, but soon discovered that is how they are supposed to be.  I wear a 7.5 in regular shoe size and wear a 38 in Euro shoe sizing.  Hope this helps you with your decisions to purchase these great shoes in any color!