Questioner
I designed a shirt with the Windrunner symbol online, and they wouldn't let me because they said a game had the rights to that.
Brandon Sanderson
Any of our symbols, the copyright is to the company. You are free to print off shirts for yourself and friends, we have no problem with that. Anything that contains artwork from our series, we don't let you sell. You can do it for your friends.
Or you can design something that doesn't use any of the artwork, and then we don't care. If you want to do something with the artwork and you think it's really cool, if you can convince Isaac, my assistant, that it's cool enough, there's a chance we'll just license it, and at that point, you get, I think, 15% off the top, and we'll sell it on the website.
That's the line we came down on. We want people to make stuff for themselves, but we don't want people selling stuff that has the artwork. If you're just making for yourself, I don't care.
We actually have a fanart policy that officially says you can do that. So if you can point the company and say, Hey this is for personal use only, I'm not going to sell it, here is the fanart policy from Brandon's website that says it's okay, then maybe they'll let you do it.
If that doesn't work, try a different place. Know that you aren't running afoul of anything on us. We even drew it up with a lawyer saying this is legal, you can do this for yourself.