The reading stick combines the benefits of a ruler and magnifier, in order to enlarge the text in any particular line. Size of lens: 24 x 210 mm (1 x 8 1/4"). 2.5X magnification. Built-in extra lens to recognise tiny details. The reading stick is made of clear acrylic and features an integrated rule measuring 150 mm (5 7/8"). Magnification 2.5X