Specification: Width of the forehead frame :135mm/ 5.31in (approx.) Lens Height:40mm/ 1.58in (approx.) Lens Width : 53mm/ 2.08in (approx.) Leg Length :140mm/5.51in (approx.) Material : PC Frame AC Lens Head Size:Narrow to Medium Diopter available: +1.0 +1.5 +2.0 +2.5 +3.0 +3.5 +4.0 Our progressive multifocal readers are designed for people who work at a desk or other workplace for extended periods of time providing greater comfort and visual clarity. The bottom of the lens is full power magnification which is then used for close-up readings. In the middle part the power magnification for computer TV watching etc. operations is slightly reduced. The top is half power magnification suitable for daily communication. Classic fashion shape spring hinge design suitable for all face shapes it is a good choice for home or office and it is also the best gift for others.