1. Buy from an authorized store

This is the single most reliable check, and it comes before you ever hold the frame. Brands sell through a network of authorized retailers, and many will only honor their warranty on pairs bought from one. Maui Jim, for example, says its warranty covers only purchases made directly from Maui Jim or its authorized retailers, and that items from unauthorized dealers, including secondhand and marketplace sales, aren't eligible for coverage.

Be most careful with third-party sellers on large marketplaces. A product page can use the brand's own photos and still ship a counterfeit, a used pair or a gray-market import. If you're not sure whether a store is authorized, check the brand's own store locator or ask its customer service.

2. Read the inside of the temples

Most designer frames carry their identity on the inside of the arms, known as the temples. On one side you'll usually find:

  • The model number, such as GG1234O.
  • The color code, which identifies the exact colorway.
  • Three measurements, such as 52 19 140: lens width, bridge width and temple length, in millimeters. Many brands print a small square between the first two numbers.
Markings inside the temples of a pair of designer framesOne temple reads AB1234O, 001, 52, a small square, 19, 140: the model number, color code, lens width, bridge width and temple length. The other reads BRAND, MADE IN ITALY, CE: the brand, the country of manufacture and the CE mark.AB1234O0015219140MODEL NUMBERCOLOR CODELENSBRIDGETEMPLEBRANDMADE IN ITALYCEBRAND OR LOGOCOUNTRY OF MANUFACTURECE MARK
What to look for inside the temples. Exact layout varies by brand; the measurements are in millimeters.

On the other side, look for the brand name or logo, the country of manufacture (for example, "Made in Italy") and a CE mark. The printing should be crisp, even and correctly spelled. Missing, uneven or poorly printed markings are one of the clearest signs of a fake.

Then compare: the model number and color code should match the box label, the certificate if there is one, and the brand's official listing for that model. If the frame shape, color or logo position differs from the official photos for that model number, treat it as a warning.

3. Look closely at the details

  • Hinges and finish. Authentic frames feel solid. Hinges open smoothly and hold their position, and metal parts have no rough edges.
  • Logos. Check placement, spacing and font against the brand's own photos. Many brands also etch a small logo into one lens.
  • Signature details. Some houses have hallmarks that counterfeiters struggle to copy well, such as Cartier's polished Santos screws or the precise engraving on its nose pads and bridge.

4. Check what comes in the box

Designer eyewear usually arrives with a branded case, a cleaning cloth and printed paperwork, often including a warranty or authenticity card. Flimsy cases, uneven stitching, misprinted labels or missing items don't prove a fake on their own, but together they're a strong signal. Some brands also offer their own verification tools; Gucci, for example, has Gucci Tag.

5. Be wary of a price that's too good

Authorized stores do run genuine sales, so a discount alone isn't a red flag. A price far below what other authorized stores charge for the same model is. As one brand puts it, if it looks too good to be true, it probably is.

If you already have a pair

Run through the temple markings and the details above, and compare them with the brand's official listing. An optician who carries the brand can usually tell you quickly, and an independent optical shop is a good place to ask.

Every store on Pairisen will be an authorized seller of the brands it carries. We're opening soon.

Join the waitlist

Sources