Ray-Ban Women 41 mm - 50 mm Lens Socket Width Eyeglass 。These are gently used Ray-Ban ladies eyeglass/Sunglass Frames w/case. The markings on the inside of the sunglasses\' arm provide specific details about the model, color, and lens type. Due to Poshmark requirements, the prescription lenses for this pair have been removed. Having your own prescription lenses added to these cute frames, will certainly save you a lot of money (even no-named frames start at $120). As noted in pictures, the left arm states \"RB4154 710/M2 3P For the Ray-Ban RB4154 model shown, here is what each part of the code represents: Model & Color Code RB 4154: This is the model number for these square-framed sunglasses, often described as having a feminine flair. 710/M2: This identifies the specific color combination.  710 is the Ray-Ban code for a Light Havana or Tortoise frame. M2 indicates the original lens type, which for this model was Brown Gradient Polarized.  Lens Category & Type 3P: This defines the lens properties. Typical Frame Measurements This model (RB4154) generally has the following dimensions:  Lens Width: 57 mm Bridge Width: 18 mm Temple (Arm) Length: 145 mm I\'m open to reasonable offers and bundles, please take a peek in my closet.