OS in sunglasses typically stands for "One Size." This means the sunglasses are designed to fit a variety of face sizes, but generally correspond to what is considered a medium size. In terms of frame measurements, "One Size" sunglasses often fall within the following range:
- Lens Width: 56mm - 64mm
Here's a more detailed breakdown based on common sizing conventions:
| Size | Lens Width (mm) |
|---|---|
| Medium | 56 - 64 |
Therefore, if sunglasses are marked as "OS" or "One Size," it is generally safe to assume that they are intended to fit a medium face size, with a lens width typically between 56mm and 64mm. However, it's always best to try them on or check the specific measurements if available, as sizing can slightly vary between brands.
