Understanding how glasses sizing works is key to ensuring a comfortable and flattering fit. Eyeglass frame sizes are typically represented by three numbers printed on the inside of the temple arm, in the format: Lens Width – Bridge Width – Temple Length (e.g., 50–20–145).

Key Frame Measurements

1. Lens Width (Eye Size): This is the horizontal width of one lens, measured in millimeters. It usually ranges from 44 mm to 62 mm. A smaller lens width can make your eyes appear closer together, while a larger width can have the opposite effect.
2. Bridge Width: This is the distance between the two lenses, measured across the bridge of the nose. It typically ranges from 14 mm to 24 mm. A properly fitting bridge ensures the glasses sit comfortably on your nose without pinching or sliding.
3. Temple Length (Arm Length): This is the length of the temple arms, measured from the hinge to the end tip, usually ranging from 120 mm to 150 mm. The temple length affects how the glasses fit around your ears and the side of your head.

Additional Measurement

• Lens Height: This is the vertical height of the lens, important for certain lens types like bifocals or progressives. It's not always listed but can be measured if needed.

Finding Your Frame Size - To determine your ideal frame size:

• Check Existing Glasses: Look for the size numbers on the inside of your current glasses' temple arm.
• Measure Manually: If the numbers are not available, you can measure the lens width, bridge width, and temple length using a millimeter ruler.
• Consider Face Measurements: Measure the width of your face and the distance between your eyes to help determine suitable lens and bridge widths.
• Remember, a well-fitting pair of glasses should align with your eyes and sit comfortably on your nose and ears. If you're unsure, consulting with an optician can provide personalized assistance