I have an extra wide foot & normally get a EU40 in slippers & even in some shoes. (I usually wear a women's 8 - 8 1/2 shoe). In the past, Haflinger slippers I tried were too tight across the top opening of the slipper, so I went with Giesswein in size 40 & they would be much more comfortable to slip on. But my expensive & cute Giesswein's quickly developed a hole on one shoe where my big toe was.  The Haflinger Lacey in charcoal 39 EU/8 M fit with plenty of room to wear socks if I choose. The wool seems sturdy, not super soft & pliable as the Giesswein. I've been wearing my new Haflinger Lacey's around inside & out of the apartment without any socks and just love them. I hope Haflinger will continue this slipper & offer some other colors like ivory. (the light grey is sold out in my size). I really appreciate all the people who left reviews on the web so I was willing
to give Haflinger another try. I probably will take these camping......