This viewer is designed for viewing sets of 3-D photographs. Two folding legs support it. Use the viewer by placing the 3-D photographs flat and then viewing them with both eyes. The coated lenses are 32mm in diameter and the magnifier is either 2X or 4X, depending on your purchase. Eye-to-eye width between lenses can be adjusted. If the pictures are incorrectly positioned, right and left, a mountain, for example, will look like a valley. Unfolded 2X - 118 x 56 x 124mm, weighing 227gm. Unfolded 4X - 118 x 56 x 82mm, weighing 216gm.