A simple white color paper frame will give you a sense of satisfaction when using it because of its moderate thickness. 4x6 inch pictures fits. The frame covers the edges of the photos about 0.3" The outer ends of a paper frame is smoothly rounded, and the back plate of the frame has a hole that is made for the use of inserting and removing pictures easily. Due to the manufacturing process, the back plate is 1mm(0.04") smaller than the front plate. The frame was made just right, so that the picture inside of it would not shift around. One set is composed with 20 sheets of white paper frame. Made in Korea