I ordered a 9W. I checked the tongue on both sneakers and it says '9" on both. So why is the left sneaker larger than the right? Also, the rocker bottom effect is slight to moderate. On the plus side, these sneakers are attractive, well made and I like the soft interior. I'm keeping them because these are my house sneakers and I don't want to have to wait for a replacement that may fit the same way. They are workable BUT too expensive. I replaced the MBT sole with an orthotic insert and I also wear a PSC foot wrap for my plantar fasciitis. This sneaker gives me plenty of room while wearing the wrap. Very comfortable. However, I would advise you to order your actual size, don't order up. These sneakers are big. I might consider ordering again despite my complaints because I have no foot pain when I walk in them. Gives my feet a nice lifted feeling (even if it's not the full-blown rocker bottom floating feeling, this will do). For those of us with foot issues, walking without pain is worth any price.