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RoundWhat do the numbers on eyeglass frames mean?
The numbers on eyeglass frames are eyeglass frame measurements, not prescription values. They usually show lens width, bridge width, and temple length in millimeters, printed as three numbers such as 54-18-145. Some frames also include A, B, and ED dimensions. These markings help B2B buyers confirm fit, size, and specification before ordering. READSUN produces custom optical frames in all standard measurements.
Eyeglass Frame Measurements: Definition and Key Features for B2B Buyers
Eyeglass frame measurements meaning: the numbers describe the physical size of the frame. They are different from lens prescription values. The most common format is three numbers separated by a square symbol (□) or dashes.
| Marking | Name | What it measures | Example |
|---|---|---|---|
| First number | Lens width (A size) | Width of one lens at its widest point | 54 mm |
| Second number | Bridge width (DBL) | Distance between the two lenses | 18 mm |
| Third number | Temple length | Length of the temple from hinge to tip | 145 mm |
| A size | Lens width | Horizontal width of the lens rim | 54 mm |
| B size | Lens height | Vertical height of the lens rim | 38 mm |
| ED | Effective diameter | Longest diagonal of the lens shape | 60 mm |
The □ symbol on a frame often separates the lens width and bridge width. For example, “54□18-145” means 54 mm lens, 18 mm bridge, and 145 mm temple. Some frames use a dash instead. The A, B, and ED markings are common in glasses frame measurements for lens cutting and frame fitting.
Eyeglass Frame Measurements: Key Facts for Importers and Brands
For importers and brands, understanding eyeglass frame measurements is essential for product selection, size range planning, and OEM communication. The table below summarizes the key facts.
- Lens width (A): affects overall frame width and face fit.
- Bridge width (DBL): affects nose fit and comfort.
- Temple length: affects how the frame sits behind the ear.
- Lens height (B): affects lens coverage and style.
- Effective diameter (ED): affects lens cutting and thickness.
- Frame width: total front width, sometimes printed as a separate number.
These measurements help buyers avoid size mismatches. They also help factories set tooling and quality checks. When you request a quote, always share the full measurement set, not just one number.
Eyeglass Frame Measurements for Wholesale and Custom Programs
For wholesale and custom programs, frame measurements drive MOQ, lead time, and pricing. Stock frames come in standard measurements. ODM modification can adjust color, logo, and some dimensions. Full OEM development allows new measurements, but requires tooling and samples.
READSUN supports custom optical frames in all standard measurements. Buyers can order stock sizes or develop custom sizes for specific markets. Our team helps match A, B, ED, bridge, and temple length to your target customer.
Eyeglass Frame Measurements: Specifications B2B Buyers Should Confirm
Before approving a quotation or sample, confirm these measurement details:
- Lens width (A): in millimeters.
- Lens height (B): in millimeters.
- Bridge width (DBL): in millimeters.
- Temple length: in millimeters.
- Effective diameter (ED): in millimeters.
- Frame width: total front width in millimeters.
- Marking format: square symbol, dash, or other.
- Size range: how many sizes per model.
Also confirm that the markings are printed or engraved correctly. Incorrect markings can cause confusion in retail and after-sales service.
Eyeglass Frame Measurements: MOQ, Lead Time, and Pricing
MOQ, lead time, and pricing depend on the measurement and order model. Stock frames in standard measurements have lower MOQ and faster lead time. Custom measurements require new tooling or adjustment, so they usually need higher MOQ and longer lead time. Material also affects cost: acetate, TR90, titanium, and stainless steel have different production processes.
For an accurate quotation, share your target measurements, quantity per size, material, logo, and packaging. READSUN will recommend the best production path.
How READSUN Handles Eyeglass Frame Measurements
READSUN Optical is a B2B eyeglass frame manufacturer with full control over frame measurements. We produce frames in all common sizes and support custom measurement development for OEM programs. Our team checks lens width, lens height, bridge width, temple length, ED, and frame width at every stage.
Buyers can order stock measurements, adjust existing measurements through ODM, or create new measurements through OEM. Learn more about our Manufacturing Excellence or review our OEM & ODM eyewear services.
Need help reading or setting eyeglass frame measurements? Contact READSUN Optical with your target measurements, quantity, and market needs.
Eyeglass Frame Measurements FAQ
What do the numbers on eyeglass frames mean?
The numbers show eyeglass frame measurements: lens width, bridge width, and temple length in millimeters. For example, 54-18-145 means 54 mm lens, 18 mm bridge, and 145 mm temple.
What does the □ symbol mean on eyeglass frames?
The □ symbol separates the lens width and bridge width. For example, 54□18 means a 54 mm lens and an 18 mm bridge.
What are A, B, and ED measurements on eyeglass frames?
A is lens width, B is lens height, and ED is effective diameter. These measurements help with lens cutting and frame fitting.
Are the numbers on eyeglass frames the prescription?
No. The numbers are frame measurements, not prescription values. Prescription information comes from an eye exam and is used for lenses, not frames.
How do I measure eyeglass frames if the numbers are missing?
Use a ruler or caliper to measure lens width, bridge width, and temple length in millimeters. For A, B, and ED, measure the lens rim horizontally, vertically, and diagonally.
Request an eyeglass frame quote from READSUN Optical today. Share your target measurements, quantity per size, material, and branding needs, and our team will recommend the best solution for your program.
