Eyekepper Rubber Painted Temple Pilot Rimless Bifocal Sunlasses plastic frame plastic lens non-polarized Lens width: 54 millimeters Spring hinge: Yes,Pupil to pupil distance: 2 7/16" (62mm),Lenses: Aspheric,Head size: Slightly wide to wider. Bifocal part is flat outside of the lens,not same the normal bifocal.Nearly Invisible Line When You're Wearing Them UV 400 Protection Scratch Resistent Coated Lenses Frame material: plastic,Lens width: 2 1/8" (54mm),Frame width: 5 1/2" (140mm),Lens height: 1 1/2" (38mm),Frame height: 1 3/4" (45mm) Hinge to hinge width: 5 3/16" (132mm),Bridge (DBL): 15mm(5/8"),Temple length: 5 5/16" (135mm)