How to authenticate a pre-owned Stone Island: the complete guide

Stone Island is one of the most counterfeited brands on the second-hand market. Compass badge, labels, Certilogo: here is the method we use in store to authenticate every piece before it goes on sale.

1. The badge: the first check

The removable badge is Stone Island's distinguishing mark, and the first thing counterfeiters copy. On a genuine piece:

• The two buttons holding the badge carry the words Stone Island engraved, perfectly legible and centred.
• The compass is correctly proportioned, with dense, even embroidery. On fakes, the yellow reed is often dull, the green too light, and the embroidery has loose threads.
• The black outline of the badge is clean and fine. A thick or uneven outline is a warning sign.
• The back of the badge shows a clean mirror image of the embroidery, with no thread wadding.

2. Certilogo: the official check

Since roughly 2014, Stone Island pieces have carried a Certilogo authentication system: a 12-digit code and a QR code on the inner label. Go to certilogo.com, enter the code or scan the QR: the answer is immediate. Careful: a valid code is not enough, because counterfeiters copy genuine codes. Certilogo must confirm that the product matches (category, season).

3. The inner labels

• The composition label is crisply printed, with no spelling mistakes and high-definition care symbols.
• The Stone Island logo font on the collar label is specific: always compare it with a genuine piece from the same period.
• The ART label (article number) follows a precise format indicating the season, the category and the model. An ART number inconsistent with the garment is disqualifying.

4. Stitching, zips and finishes

• The stitching is straight, dense and even, including in hidden areas (inside the pockets, the lining).
• The zips are usually quality YKK or Lampo, running smoothly.
• The press studs carry the brand name cleanly engraved.
• On garment-dyed pieces (the brand's signature), the colour is deep and slightly uneven. A flat, uniform colour is suspect.

5. The warning signs

• A price that is too good to be true on a piece in high demand.
• A seller who refuses to show the Certilogo label or the badge buttons.
• Blurry photos, or only official brand photos.

FAQ

Can you authenticate a Stone Island without the badge?

Yes. The badge is easily lost in second-hand. Authentication then rests on the labels (ART, Certilogo), the buttons, the stitching and the quality of the materials. A missing badge lowers the price but does not mean the piece is fake.

Is Certilogo 100 % reliable?

It is the best public tool, but it must be cross-checked with a physical inspection: genuine codes are sometimes copied onto counterfeits.

Do older pieces (before 2014) have a Certilogo?

No. For vintage pieces, authentication rests entirely on expertise: period labels, cuts, materials and ART numbers.

Where can you have a Stone Island authenticated in Toulouse?

In our Prego × Le Kap Shop store, 5 bis rue de Mirepoix. Every piece is physically inspected before going on sale — that is our authentication process.

Read next

• Stone Island hoodie: models, prices and sizing guide
• Stone Island or C.P. Company: which brand to choose?
• Second-hand streetwear and luxury in Toulouse: the complete guide

Looking for a pre-owned Stone Island that is already authenticated? Browse our selection: pre-owned Stone Island, Stone Island clothing and Stone Island sweatshirts. Every piece is checked by hand by our team.