Ray Ban Sunglasses. Series number: RB2188. Color code: 901/31. Shape: Square. Lens Width: 53 mm. Lens Height: 47 mm. Lens Bridge: 24 mm. Arm Length: 140 mm. 100% UV protection. Non-Polarized. Frame Material: Acetate. Frame Color: Black. Lenses Type: Green Classic G-15. Rim Style: Full-Rim. UPC/EAN code: 8056597216326. Ray Ban Green Classic G-15 Square Unisex Sunglasses RB2188 901/31 53.