I wear a street Euro 37. I bought these in a 6/Euro 39 . They don't come any smaller.
I only wear these indoors I chose these because they are stiff and the stiffness helps me stick a foot way out there (for someone with short legs like me). I can literally stand on the tips of the shoes like a ballet dancer in pointe shoes and they don't bend.
With lace-up shoes I keep the laces loose through the toes and then tighten as I get to the top of my foot. The laces are the lumpy style which excel at helping you spot tighten the shoes if there's just one or two areas you really need the shoe tight.
I climb indoors 2 - 4 days a week. I feel more confident in these shoes because I can predict how they'll respond better than the rental shoes since every climb was with a different pair and socks (I was not going to put my bare feet in rental shoes!).
Leather and lined with a moisture wicking material . On the box it says lined leather shoes will stretch about 1/3 of a size. Every time I put these on I think they're too small and after about 5 minutes I fall in love with them again.
Final deal closer for me was that they are Made in the USA!