These things are VERY comfortable!  Other reviewers say to order a size up.  I ordered my proper size, and they're fine.  I like my heel to rest at the very end of the sole, and my toes right at the tip.  If you need an extra "lip" past your heel & toes, then order a size up.  Otherwise, you'll be fine.  The sole is soft and your feet sink in.  They feel a hundred times better than sandals that you'll buy at your favorite stores in your local mall. I also like the firm hold of the thong.  You don't feel like you'll lose these things while walking- like you sometimes do with other sandals. I like the rainbow pattern on the thong as well.  It opens these sandals up to be worn with pretty much every color clothing ensemble that you can think up!  These are very comfortable and versatile sandals.  I'm very pleased with my purchase.  Sanuk has found another repeat customer!  And, kudos to Amazon for quick processing and delivery as usual!