I bought these for my mom as a replacement pair for an old pair that were worn. My mom suffers from arthritis in her left  foot so its like double the width and having the option to get them in the right width was key! I had bought a pair of 9.5 and fit the left foot perfectly but Judy way to big for the right, ordered the 9 and its srill a little loose on the right but way more manageable-  they are a nice stable mule to have for someone who has bad joints or who suffers from pain/