Short answer

Counterfeit Hermes bags are built to the published numbers of the authentic models. Sellers list those numbers, not new ones. A Birkin 30 copy is sold as 30 x 22 x 16 cm, the same figure Hermes prints for the Birkin 30. Measured size on a counterfeit depends on the factory, the batch, and the point on the bag where the tape sits. No public dataset records that spread.

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How Hermes reports size

Hermes lists three numbers for each handbag: width across the base, height at the center of the front panel, depth at the base. Handles, sangles, clochette, and hardware sit outside those numbers. A bag labeled 30 cm measures 30 cm at the base seam, not at the top opening. This matters because a Kelly narrows toward the top and a Birkin holds its width from base to rim.

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Birkin dimensions

  • Birkin 25: 25 x 20 x 13 cm (9.8 x 7.9 x 5.1 in)
  • Birkin 30: 30 x 22 x 16 cm (11.8 x 8.7 x 6.3 in)
  • Birkin 35: 35 x 25 x 18 cm (13.8 x 9.8 x 7.1 in)
  • Birkin 40: 40 x 30 x 21 cm (15.7 x 11.8 x 8.3 in)

Kelly dimensions

  • Kelly 25: 25 x 19 x 9 cm (9.8 x 7.5 x 3.5 in)
  • Kelly 28: 28 x 22 x 12 cm (11 x 8.7 x 4.7 in)
  • Kelly 32: 32 x 23 x 12 cm (12.6 x 9.1 x 4.7 in)
  • Kelly 35: 35 x 24 x 13 cm (13.8 x 9.4 x 5.1 in)

Constance, Picotin, and Evelyne

  • Constance 18 (mini): 18 x 15 x 5 cm (7.1 x 5.9 x 2 in)
  • Constance 24: 24 x 18 x 7 cm (9.4 x 7.1 x 2.8 in)
  • Picotin Lock 18: 18 x 19 x 13 cm (7.1 x 7.5 x 5.1 in)
  • Picotin Lock 22: 22 x 22 x 18 cm (8.7 x 8.7 x 7.1 in)
  • Evelyne III PM: 28 x 30 x 8 cm (11 x 11.8 x 3.1 in)

Points where counterfeit sizes drift

Counterfeit patterns copy the headline width. Differences show up in three places.

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  1. Depth. A copy listed at 16 cm can measure 14 cm to 18 cm at the base gusset, because the gusset is cut as a separate panel.
  2. Strap drop. Kelly and Constance straps vary by several centimeters in length.
  3. Handle clearance. Birkin handle arcs run tight to wide, which changes how the bag sits on the arm.

Buyers who compare seller photos to a tape measure need the bag in hand. Photos hide 2 cm to 3 cm of difference at a normal viewing distance.

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Measurement points to record

  • Base width along the bottom seam
  • Height at the center of the front panel, base seam to top edge
  • Depth at the widest point of the base gusset
  • Handle arc height, measured from the top edge of the bag
  • Strap length end to end, buckle to buckle

Legal facts

In the US, trafficking in counterfeit goods is a federal crime under 18 U.S.C. § 2320. A first offense carries up to 10 years in prison and a fine; a second offense carries up to 20 years. Civil suits under the Lanham Act allow statutory damages of $1,000 to $200,000 per counterfeit mark per type of goods, and up to $2,000,000 if the use is willful. Import rules under 19 U.S.C. § 1526 let CBP seize and destroy goods that carry a counterfeit mark. CBP reports thousands of intellectual property seizures each fiscal year, and handbags and wallets rank near the top of seized categories by value.