I wear a 36 Arizona and would get a 37 in the closed shoes if I ever get any. At this point I just wear socks in the winter with my sandals & loosen the straps one notch - (boots in the snow to the car - then birks as soon as I get inside the door at work or home - but then we had the mildest winter ever in MN last year - may not work so well with a normal one!)

Also, I did not find a pair of closed toed birks that looked very eye appealing - my husband actually could hardly stop laughing at the "great, big, toe area" - reminded him of the shoes clowns wear. Had to admit he had a point. However, he did say I should just get them if they felt good as that, of course, is the main consideration. After looking, I found a diffent shoe I preferred - the Ecco (Alpha style & it's a clog)...they look great, have a similar heel cup area, although not quite so pronounced... and feel good on my feet. Great with slacks/jeans etc... & I've gotten quite a few compliments on my cute shoes - didn't know they would be an in-style shoe.