Barton Perreira "Joplin 2" round sunglasses. Lens/bridge/temple (in mm): 57-20-145. Zyl (zylonite acetate) frames with nose bridge in silvertone metal. Mirrored, round lenses. Adjustable nose pads. Slim, wire temples with capped earpiece. 100% UVA/UVB protection. Can be fitted with prescription lenses. Handmade in Japan.