I'm making a Winter Soldier cosplay, and I have all I need but the mask. I'm really new to cosplaying and I don't know much about how to make stuff. This is my first proper cosplay and I would be so grateful for all help I can get.
It really depends on your budget and how accurate you want it to be.
There's a simple template on google images which would work for craft foam, 2mm thick sheets are cheap and available in lots of different colours/sizes.
There were a couple of masks on ebay recently that looked ok and weren't too expensive.
The best mask I've seen is currently available on here, TheRocketeer has a superb looking mask and goggles combo available in the Project Runs section.