I ordered a 12 piece Picture Frame Set of 5" x 7" and four more sets of 12 (48 total) of 4" x 6".   Knowing I needed to buy a lot of picture frames, I decided to get the plastic frames instead of the wooden ones to save money.  They aren't great, but they'll serve my needs. Once I got my photos in the frames, they didn't look all that bad. You get what you pay for.