I got these Ecco velcro sneaks and ended up keep both pair I ordered. the pink in 38 and the black in 37. I wanted pink in 37, but they were sold out. It turns out the 38 is find for wearing with thick socks, which I will need to do in winter, and the 37 is great sockless or with thin socks.
I noticed they are now nearly sold out. )-:
I have flat feet, slightly narrow, FWIW, and needed something casual to throw on to replace my summer Birkenstock staples.