I use Instagram as a repository for artistic shots, many which I take with my iPhone 5 and post-process using apps on my iPhone 5. On rare occasion, I may post something that I like well enough to want to get a physical print of it to hang in my house. Recently I used a service called Instacanv.as to get a canvas version of my own photo. (The one to the right is a 16 inch by 16 inch canvas.)When you understand that images on Instagram are only 612 pixels by 612 pixels, it doesn't seem to make sense to create prints from photos on Instagram, even though Instacanv.as makes it very convenient to do. However, Instacanv.as has an answer to that. They claim to use a resizing and optimization algorithm that makes for "crystal clear, crisp images". That sounds like a lot of marketing but my experience was that they did a really good job. My photo was on canvas and was somewhat "painting-like" after my post-processing so there was some room for error, but I could find no pixelation and the printed image looks like the piece of art that I wanted it to be.
Another benefit of Instacanv.as is that you can sell prints of your own. You pick what Instavanv.as photos to add to your gallery and you can add hashtags to your photos on Instacanv.as that are different than what you use on Instagram, though the Instagram hashtags are added by default. You can also enter a caption and assign a category for each photo to make the photos more discoverable. If you sell an item, which can be a canvas, a framed print, a prism (a 6x6 acrylic paperweight), greeting cards, or an iPhone case, you get 20% of the sales price, which really isn't bad since they handle the display, production, shipping, and collection the money. As of the time I write this, I haven't yet sold any of my photos yet, and I don't know if I will, but it's nice having that possibility for very little effort (aside from the effort it took to create the image in the first place).
