I'm trying to get this done as a custom playmat, and you can find info and templates here to get the right size.
http://www.inkedplaymats.com/products/custom-playmatI'd like to get this as close to the requested resolution as possible, so a clean3675x2175 (I plan on submitting rotated as a portrait to fill out the space). I'd also like if someone could change the S to a C in "JASE"
Honestly I don't even know if it's possible to get the picture larger without messing it up. I tried contacting the artist, but they haven't been on their DA page in years. If anyone could help me out, I'd be incredibly grateful.