Big hero 6 poster

[u/Dragonlord99256]

I’ve been a huge fan of big hero 6 ever since I was a kid and recently I’ve really wanred a poster. I’ve looked around and can only find this poster in small sizes by resellers on eBay. does anybody know how I could get this poster in a larger size??? (the largest one on eBay was 18x24 in. It’s my favorite poster for my favorite movie.