Needle size

I know there is a website out there that tells you the conversion from mm to US sizes - does anyone know where? Thanks

Here is one. Hope this helps.

You can also check this site out. You not only get the hook and needle size conversions, but the yarn weight system and standard body measurements and sizing, too.
http://www.yarnstandards.com
Katrina

Try, www.lionbrand.com.

And yet another:

Knitting Needle Conversion Chart