How to authenticate Common Projects

About Common Projects Authentication

Common Projects was founded in New York in 2004 by Flavio Giordano and Peter Poopat, and all production takes place in Italy. The brand is defined by radical minimalism: no visible logo, no branding on the exterior except for a ten-digit gold foil number stamped on the lateral heel. This number — encoding style, color, and size — is Common Projects' sole external identifier and its most critical authentication point.

The Achilles Low and Achilles High are by far the most counterfeited models. Superfakes now replicate the heel number format closely, so leather quality and sole construction have become equally important authentication signals.

Key authentication signals

• Gold heel stamp format and quality. Ten digits are stamped in gold foil on the outer lateral heel, divided as four digits (style number), two digits (European size), and four digits (color code). The digits are evenly spaced, lightly embossed into the leather, and the gold foil sits cleanly within the impression without bleeding onto surrounding leather. Fakes show gold that sits on top of the leather surface (painted rather than foil-stamped), uneven spacing, or digits that vary in size within the same stamp.
• Margom sole integrity. All Common Projects Achilles models use a Margom rubber sole — a specific Italian rubber compound with a distinctive clean, translucent off-white or cream color and a specific density. The Margom stamp appears on the outsole. A sole that is bright white, visually uniform, or lacks the Margom mark indicates a substitute sole unit.
• Italian leather quality. The Achilles uses full-grain Italian calf leather with a consistent, fine-grained texture. The leather is supple yet holds its structure. Grain is consistent across the vamp and quarters. Lower-quality leather — stiffer, with visible surface coating or inconsistent grain — is a reliable fake signal.
• Insole construction. The insole is smooth leather with correct thickness and surface finish. On fakes the insole is thinner, has an incorrect surface texture, or shows adhesive bleed at the edges. The insole should lie flat with no curling at the toe.
• Stitching at the back seam. The heel counter seam uses a consistent, fine stitch — approximately 9 to 11 stitches per centimeter. Thread color matches the leather precisely. Visible thread ends or irregular stitch intervals at the back seam are a construction failure not found on genuine Common Projects.
• Box and dust bag. Authentic Common Projects arrive in a clean, minimalist white or off-white box with the brand name in a small, precise font and a branded cloth dust bag. Generic or unbranded packaging is a red flag.

Serial and reference numbers

The ten-digit heel stamp is the brand's de facto serial system, but it is not individually unique per pair — the same number appears on every pair of the same style, size, and color within a production run. Authentication therefore relies on the quality of the stamp execution, leather quality, and sole construction rather than number uniqueness. The style portion (first four digits) can be cross-referenced against known Common Projects style numbers for consistency with the claimed model.

Common counterfeit red flags

• Gold heel number appears painted on the leather surface rather than foil-stamped into a recessed impression.
• Margom sole mark absent, or sole is bright white rather than the characteristic off-white or cream tone.
• Leather grain is inconsistent between panels or feels coated and stiff rather than naturally supple.
• Insole is thinner than expected or shows adhesive residue at the edges.