If you want custom posters that look sharp and arrive in packaging you can recycle, you have four practical routes: a local sign or print shop, an online design-and-print service, a specialty fine-art or photo printer, and a print-on-demand marketplace. Judge each one on the same three points: the paper it prints on and the image resolution it asks for, a plain statement of what the order ships in, and how fast you can have the poster in your window. A storefront that needs a "Now hiring" poster this week