Your search for "photo crate" revealed the following:
4 x 6 File Folder - Kraft
$3.99Kraft paper based file folders that are just like the office file folders, but only measure 4x6 when folded. They...
12x12 Wood Frame - Natural
$14.99Designed to hold 12-inch-by-12-inch papers, this 14.5-inch-by-14.5-inch wooden frame is a great way to display scrapbook layouts, printed paper, and more....