I ordered the Keen Whisper Sandals in a Women's Black, size 11.  I am a true size 11 and have never had a problem with a shoe not fitting me.  I read some of the other reviews about these sandals running small, but foolishly disregarded the input.  I wish that I had paid them heed.  These sandals do not run true to size.  They run at least a half size too small, maybe a full size depending on how much wiggle room you like in your Keens.  They also do not have the removable sole insert like some of the other Keen models, so you cannot hope to make them roomier.  They are very form fitting.  Assuming you order a half to a full size larger than your usual size, I think these shoes would probably be great. Unfortunately, I can't say because I returned my pair and will wait to try them on in the store before re-purchasing.