Frames sizing is typically represented by three numbers, such as 55-17-148, which correspond to specific measurements of the frame. Here’s a breakdown of what each number signifies:
- The first number, in this case, 55, indicates the horizontal width of each lens, measured at its widest point. This measurement is crucial for ensuring that the lenses fit well within the frame. Lens widths generally range from 40 mm to 62 mm for most eyeglass frames.
- The second number, 17, represents the bridge width, which is the distance between the two lenses. This part of the frame rests on the nose and is essential for comfort and proper fit. Typical bridge widths range from 14 mm to 24 mm.
- The third number, 148, denotes the temple length, which is the length of the arms (or stems) of the glasses that extend over the ears. This measurement is measured from the hinge of the frame to the end tip of the temple and usually falls between 120 mm and 150 mm.
Choosing the correct frame size is vital for comfort and functionality. Ill-fitting glasses can slide down the nose, pinch the skin, or cause visual discomfort. Therefore, understanding these measurements helps in selecting frames that not only fit well but also complement your facial features.
When shopping for glasses, especially online, it’s advisable to check the specified measurements to ensure a good fit. If you’re unsure, you can also measure your current glasses using a millimeter ruler to find similar dimensions.