la sportiva mythos size

What is the general down size for the mythos? I heard people say get them pretty small because they stretch but what exactly is pretty small?

I wear a 42.5 (9.5) street shoe and downsize my Mythos to 39 1/2, which is approximately 2 sizes, and they are comfortable, but snug.

I wear a size 42 (US mens 9) street shoe and I bought a mythos size 42 and they were tight to begin with but are nice now

I would also size them about 1.5 - 2 sizes down

1.5 to 2 sizes, they stretch alot. Even sized that way at the beginning they'll end up being comfortable enough for all day climbs.

I'm on my second pair of Mythos and both times I dropped just one size. I wear a 43.5 and I went down to a 42.5. I tried to go down to a 41.5 then a 42 and I just couldn't do it. I couldn't even pull them on much less climb in them. Its worked out great for me. I sent my first pair in for resoling and when the ones I'm wearing now need fixed up I will switch back.