I am in the process of trying to figure out a gallery wall myself. I was inspired by a photo in PB that has a gallery over a long table. I started by picking pics of my kids that I love! They are almost grown now, but there a few pics that I love from when each were little. I scanned them and printed them in black and white and sepia tones and placed in black frames from Target. I also will frame a large silhouette of one of my kids that they created in elementary school. It's big so I hope I can find a frame that looks right. I also found a large pencil drawing of my mother from the seventies and another pencil sketch of a dog my dad did when he was seventeen. He was quite artistic! I'm hoping the black/white/sepia theme all with white mats and black frames will give a cohesive look. I plan on hanging them on a large wall in our FR.My picture frames range from 16x20 to 4x6. I haven't hung them yet, but I am excited I have finally started the process!

Try this!

Although, I'm pretty sure if you decide what you like, you could probably DIY a lot cheaper than what they are offering.

Here is a link that might be useful: Picture wall gallery