I was disappointed with these flip flops.  I own a pair of Sanuk Yoga Serenity flip flops, but couldn't find them anywhere online, so I settled for these, thinking they'd be just as comfortable.  I ordered my usual size 8.  When I tried them on they were way too small, at least by a full size (too short and tight across my foot).  Also, the yoga mat material isn't as thick as the Yoga Serenity flip flops.  If you do order these, I highly recommend going up a full size.