I got these in 11 because the 10s were too tight and the size 11 mostly fits me in the elastic version, but the right shoe is too long for my foot (my left foot is the larger one) and both seemed loose after wearing them for one day.
They are very soft and comfy, like wearing slippers, but you could wear them to go places or even to work if your workplace is casual.
I'm going to wash mine (which you are not supposed to, it's nice suede leather) and see if they shrink a little.  I can't send them back now that i wore them for a whole day... and in fact i really want to be able to use them, so i might as well.