I agree with other reviewers that these shoes are ridiculously narrow. This was my fourth pair of shoes in the ASICS gel Nimbus series, and all three previous shoes I wore a size 9.5 and the fit was perfect! So I didn't even hesitate to order the same size I always wear, but when they arrived they were painfully narrow. Fortunately I was able to get a decent fit by ordering a half size larger and switching to thinner socks.  Save yourself the aggravation and just order a larger size the first time!