Enhanced Durability: These reading glasses offer reliable performance

but also for computer and looking close

Lens height about 1 1/2 inches (39mm)

Lens width about 17/8 inches(48mm)

Due to the difference between different monitors

4 Pack Ladies Stylish Bifocal Reading Glasses BR2027 feed-cl0-BB40 Enhanced Durability: These reading glassesAcrylic lens, plastic frame with spring hinges Frame width about 5 5 16 inches (135mm) Lens width about 1 7 8 inches (47mm) Lens height about 1 1 2 inches (38mm) Bridge (DBL) about 7 16 inches (11mm) Temple length about 5 5 16 inches (135mm) EYEKEEPER BIFOCAL GLASSES A crescent shape on the bottom part of the lenses have magnification, which is for reading and close up work. And the other parts of the lenses have no magnification,which is for distance