I have been wanting to print some of my Instagram photos for awhile now. I discovered Persnickety Prints (via Instagram, actually!) and ordered a bunch of the photos of my kids. The cool thing is that if you posted it on Instagram, it's probably something you want to remember, so it's easy to choose which photos to print. I ordered the 3x3 prints, but they also have other sizes. I was a bit tempted to order 2x2's and buy a big white poster frame to make a InstaCollage.
First, I laid them out on a piece of cardboard to see if they fit. Then I went and bought a piece of black foam board and cut it to fit.
I spread out my options for attaching them to the board. I wanted to use white photo corners, but I had JUST enough room for the photos and the corners added too much space. If your frame is a different size, or if you're using less photos, I think the white photo corners would be super cute.