【Lens:TAC polarized lens, UV400 protection】It is impact resistance and scratch resistance, it will not be broken even if you hit the lens with hammer. Lens width:62mm(2.44 inches)-lens height:50mm(1.96 inches)-bridge width:20mm(0.78 inches)-arm length:145mm(5.71 inches).It is only 20g, You can hardly feel them on your face, but they are unbreakable.