Our Slimfold Style 5 folding reader is a modified rectangle shape, with a slightly curved rectangled lens, similar to the Slimfold Style I and Style III, but a bit larger and more rounded on the bottom. It fits into a special protective case, and has the largest lens available at 53mm. These are the authentic and original SlimFold reading glasses, made in Japan by Kanda of Japan. These optical quality frames incorporates a four-position adjustable bridge, providing you with truly a custom fit. This amazing reader is only 10 mm thick, less than 1/2 the size of the typical folded reader. Elegant when worn, incredibly convenient in purse or pocket....this is a classic beauty that enchances your appearance. So slim they take almost no room in pocket or purse. Style 5 is available in Black, Brown, Pewter or Gold to satisfy every discriminating taste. Here's the optical sizing scoop: Lens: 53mm Bridge: 25mm Temple: 140mm