I purchased these at Megane Ichiba (Eyeglass Market) several years ago. They are prescription glasses, but the prescription strength is unknown. I used them a few times, and they have been stored at home since then. I am selling them now as I no longer need them. Size: Frame size guide: Large Lens width: 56mm Nose width: 16mm Temple length: 140mm Vertical lens height: 33mm The lenses are a little dirty, so I recommend having the lenses replaced or adjusted at Megane Ichiba. Thank you. Manufacturer: i-Athlete Color: Brown (frame color) Please understand that these are used items.