Listen carefully. This could get a little complicated. But if you pay close attention, we promise it'll be worth it. Here's the deal: We've got three different models of a full-rim, round, medium-wide, faux-wood hypoallergenic eyeglasses frame, in three slightly different sizes, for Men, Women, and Unisex. This frame, 1878, is Unisex. It comes in two models, one black on the outside with white on the inside, the other gray outlined in green. It's the same size as similar models 100015 and 100017, which we identify as Women's. But the frame width of the 1000 and 1878 models a little wider than that of 189812 and 189832, which we identify as Men's. They all have stainless steel rods embedded in the temple arms to make them easy to adjust. So check the dimensions you need, and get the model that fits you best!