When folded, the lens is protected. Have you sometimes in your pocket, sometimes on a ribbon around his neck. Of the lens diameter 20 mm, thickness of the lens is about 10 mm. Focal Length 25 mm, which corresponds to the promised magnification of 10x. The housing is collapsed about 38 mm long, 25 mm wide and 18 mm thick. Weight? The magnifying glass is made of metal and glass ... Unfortunately I have no letter scale, but know me as a physicist to help already: So about 30 g.
