I just love these slippers. Size L were perfectly fitting on (EU: 38) my feet.
They're also soft and comfortable, they didn't bother my feet at all after wearing them the whole day. And they're also very cute! :)
I have arch issues with my feet so I always have to wear heeled sandals in order to be comfortable. These sandals are great! Super comfy and it even feel like there's arch support already in :). I bought a small and I wear a US size 6 in sandals and flats & a 7-7.5 in shoes.