I tried this bootie in the light color. It is SO comfortable due to the very soft leather and the forgiving sandal strapping over the foot. but may not work for me, and that perplexes me! It's in whole sizes only and the 39 seems a tad large, but not sure I could go a full size down. The light color might actually be too light for me. For some reason I donf like it as much with skirts as if hoped( looking for a " nude"). Something about too much buckles maybe, so while it seems slim, it's a little " busy".
May try it in black and size down to see or add insert and see what looks like with dark bottoms.
I have to be careful not to force it to work, but the soft leather is fantastic.

Anyway, someone else needs to try it!