I accidentally found my first pair of these in a running shoe store after having a pedicure and wearing closed toes shoes.  They were the only thong flip flop in the store, and I thought they were too expensive but interesting looking, soI put them out of curiosity, and immediately knew I had found something that had the potential to help my overused feet.  I swallowed the price and purchased them on the spot.  I went home and found another color on Amazon at a better price and purchased them, too.  As a school teacher, always on my feet, I have had SO much trouble with my feet hurting at the end of the day. I have also completed three half marathons and have given my feet some punishment.  I read they were recovery shoes for marathon runners, these are truly are recovery shoes! Wow!  I wore out my first two pairs and just purchased two more but use the older ones for working around the house and outside, and they are still pretty supportive (wore off the tread and paint is cracking after three years).  They are my go-to shoes.  I wish I could wear them everywhere and with everything.  I have bought them for friends and convert others to them with one try on of my shoe.  The size is true:  I wear an 8 and purchased an 8.  I do not have high arches, and one is almost flat, so I was a bit worried about the initial feel of the arch in these - no issue; in the end, nothing but happiness.  The foot bed is atypical for a flip flop: most are flat and thin; this is thicker and pushes back at the foot as you walk, and it has cured my foot issues.  Thank you, Jesus! Buy them!