Oakley Serial Number: How to Read the Model Code on the Left Temple

On the left temple, the arm on the wearer's left. Oakley's warranty pages for the US, UK and Canada say the model number is printed there, and that you use it to buy replacement parts in Oakley's parts portal. Oakley does not give an exact spot on the arm.

Saber Tecnologias, a Portuguese content site that ranks in search, says the right temple. That contradicts Oakley. Revant, a US maker of replacement lenses, says that on wire models the code may sit under an ear sock.

Oakley Meta smart glasses are different. Oakley says their serial number is printed on the inside of the left temple and shown in the Meta AI app. The Oakley Meta guide explains how to compare the two.

Oakley's rule: the model code comes right after the letters OO, OX, OY or OJ. It is 4 or 5 digits with no space. It is usually separated from the colour code by a dash. Oakley's picture of a matte black Holbrook reads OO9102-01, then 57, a small symbol and 137, and it labels 9102 as the model code.

Oakley does not say what the prefixes or the colour codes mean, so this guide does not guess. Oakley does not label 57 and 137 either. According to an optician's guide from Isolani, frame sizes are printed in the order lens width, bridge, temple length, in millimetres. ISO 8624:2020 names these the horizontal boxed lens size, the distance between lenses and the overall length of side. By that order, 57 would be the lens width and 137 the temple length. The symbol between them is too blurred to read in Oakley's image.

Read the print part by part:

These codes come from the product data in oakley.com's menus, read on 3 November 2026. Use them to see what real codes look like. They are examples, not a full list.

Custom builds use another form: 0OO9102 for the Holbrook, 0OO9208 for the Radar EV, 0OO9438 for the Eye Jacket Redux, 0OO9406 for the Sutro, 0OO9013 for the Frogskins and 0OO9403 for the Sphaera. Each comes with a further number that Oakley does not explain (55, 38, 58, 37, 55 and 36), so it cannot be read as a size with confidence.

Colour codes run from 2 to 4 characters and can include letters. So rules such as always two digits after the dash do not fit Oakley's current codes. No OY or OJ example appeared in Oakley's data.

EyeBuyDirect and FramesDirect say a new Oakley's box carries a barcode and model details. Oakley's web product data gives a 12-digit UPC starting 888392 for every eyewear and goggle product shown, for example 888392320544 for the Holbrook OO9102-E855. Some shoes and helmets carry 13 digits. Feel Good Contacts says a genuine barcode is usually 13 digits, which Oakley's data does not support. Barcode length proves nothing.

Not on current standard frames, as far as Oakley's pages show. Oakley's support pages describe model and colour codes for frames, not unique serials.

Retailers describe exceptions. EyeBuyDirect says newer Oakleys have only the model code, while vintage, early-production and some special-edition pairs often carry a serial, usually on the inner left temple near the hinge. Feel Good Contacts, whose article is reviewed by a dispensing optician, says vintage serials had seven digits and current Oakleys have none. Underpriced, a reseller app's blog, says X-Metal frames made from 1997 to 2011, including the Romeo and the Juliet, carry unique serials etched, not printed, inside the earstems.

According to Revant, older codes looked different. It says they were two digits, a dash and three digits, such as 03-609 on a Half Jacket, and later ones looked like OO9143-03 on a Tron Legacy Gascan. It says some older Asian Fit models add a J. So an old pair with an unfamiliar code is not automatically fake.

Oakley Meta smart glasses do have a true serial number, shown in the app and inside the left temple. See the Oakley Meta guide.

ISO 12870 (the 1997 edition, since replaced) set tolerances on the marked sizes of a frame without lenses: ±0.5 mm for lens size and bridge, and ±2.0 mm for temple length. So a small gap between the printed size and your own measurement is a reason to look closer, not proof.

The Holbrook shows why one number is not a test. Oakley's picture shows 57. Oakley's Custom Holbrook code comes with 55, which Oakley does not explain. Revant says the standard Holbrook reads 55-18, or 56-17 for the Asian Fit. EZContacts shows a genuine Holbrook XL marked 59-18-137 with a square symbol and calls that normal, while Revant says the symbol between Holbrook sizes is the Oakley ellipse.

So neither the symbol between the numbers nor one size figure tells real from fake. Compare with what Oakley lists for that exact code.

Revant, FramesDirect and EyeBuyDirect say fakes often print zeros instead of the letter O. In Oakley's temple rule, the model number comes after the letters OO, OX, OY or OJ, and Oakley Meta uses OW. These are letters, so zoom in on them in a sharp photo. Oakley's web data writes Custom builds with a 0 in front, as in 0OO9102, and it is not known whether that 0 is printed on the arm.

The same three retailers say counterfeiters copy real codes onto the wrong model or colour. So search the code and check that the result shows your model and your colour. EZContacts says a matching code is a useful check but not proof. The Sunglass Fix says markings should be evenly spaced, and some fakes print them crooked.

A missing code is not automatically a fake. Revant says the pair may be a warranty replacement or a Custom build, or the print may have worn off. On wire models, look under the ear sock. Revant adds that a pair sold as new should show a code.

No official online checker was found. Oakley's own route is a photo review. In the US, EU, UK, Australia, Canada and Poland, you email Customer Care a few clear photos and where you bought the pair. In Brazil and Mexico, you call and send a photo. Start at oakley.com/contact.

To look up a code yourself, search for the full code together with the word Oakley, for example Oakley OO9102-E855. Check that Oakley's own site or an authorised dealer shows the same model and colour as your pair. Oakley's parts portal also takes the model number, to sell replacement parts. Both show that a model exists, not that your pair is genuine. Third-party sites are not Oakley: Saber Tecnologias also calls the King of Lenses site an official identifier, but it is a third party.

The limit: a matching code cannot prove a pair genuine, because Revant, FramesDirect and EyeBuyDirect say some counterfeiters copy real codes. A code that does not fit the model and colour counts against a pair, but it is a warning sign to follow up, not a verdict, because older pairs and Custom builds can carry codes in other formats.

A code that does not fit the model or colour is a strong warning sign, but ask before you decide. Take these steps: