we want to start an poster POD Service for cars. Could you know the biggest POD Service Provider with the biggest offer in sizes? I know Printful and the other big player, but they only have some sizes. But I need big choices for customer. Also we want to sell worldwide, so I need an provider which prints in EU and US.
Thanks for your help!
I'm digging into the print on demand as well. From what I have found Customcat seems to me have plenty size of canvas / posters. You can do directly to the catalogue page to see in details https://www.customcat.com/?t=h.catalog
I don't know why, but it's hard to find product "canvas", so you'll need to type "canvas" in the search area as I did.
When you select the specific product you'll see many variants and colors as well. I believe they deserve the attention of merchants.
Here is more information about selling art work https://www.shopify.com/blog/211990409-how-to-sell-art-online
And canvas selling guide https://blog.customcat.com/now-offering-print-on-demand-canvas/
Hope it helps.