Walls of small pictures are in style. Use frames that complement each other. One decorator says not to use gold and silver frames but that gold and wood or black and white will work. We think any frames that are similar in size will work if arranged cleverly. Hang with about 1 1/2 inches between them at the top, bottom and sides to form a large rectangle or other pleasing shape. You can mix paintings, prints and photographs if the shapes work.