The short answer
Fake Hermes bags borrow the naming system of the real thing: the number is the width in centimeters. A replica Birkin 30 measures about 30 cm wide, 21 cm tall and 15 cm deep, which is 11.8 x 8.3 x 5.9 inches. A replica Kelly 28 lands near 28 x 22 x 11 cm. When a listing drifts 2 cm or more from those figures, treat it as a different size class, not factory tolerance.
Birkin replica dimensions
Birkins are soft-bodied, so numbers make sense only with the bag empty and settled. A stuffed Birkin tapes out wider and deeper than it sits in daily use.
- Birkin 25: 25 x 19 x 13 cm (9.8 x 7.5 x 5.1 in).
- Birkin 30: 30 x 21 x 15 cm (11.8 x 8.3 x 5.9 in).
- Birkin 35: 35 x 25 x 18 cm (13.8 x 9.8 x 7.1 in).
- Birkin 40: 40 x 30 x 20 cm (15.7 x 11.8 x 7.9 in).
Kelly replica dimensions
Sellier (stiff) versions hold shape, so they measure close to the listed spec. Retourne (soft) Kellys look a touch shorter when empty and a touch taller once packed.
- Mini Kelly 20: about 20 x 13 x 6 cm (7.9 x 5.1 x 2.4 in).
- Kelly 25: 25 x 19 x 10 cm (9.8 x 7.5 x 3.9 in).
- Kelly 28: 28 x 22 x 11 cm (11 x 8.7 x 4.3 in).
- Kelly 32: 32 x 23 x 12 cm (12.6 x 9.1 x 4.7 in).
Constance, Garden Party, Picotin and Lindy
- Constance 18: about 18 x 14 x 6 cm. Constance 24: about 24 x 17 x 7 cm.
- Garden Party 30: about 30 x 21 x 14 cm. Garden Party 36: about 36 x 26 x 17 cm.
- Picotin Lock 18: roughly 18 cm across the base and 18 cm tall with the sides held out. Picotin 22: closer to 22 x 21 cm.
- Lindy 26: about 26 x 18 x 12 cm. Lindy 30: about 30 x 20 x 16 cm.
How I measure a fake to confirm the size
You need a soft tape and a flat surface. Ask the seller for photos with the tape in frame, because a number typed into a listing tells you nothing about what shipped.
- Empty the bag, close the flap and both straps, and let the leather relax for a minute.
- Width: run the tape along the front of the base, edge to edge, no squeezing.
- Height: bottom seam to the highest point of the bag body. Leave the handle out of it.
- Depth: across the base at the widest point, not the bulge near the top.
- Handle drop: top of the handle down to the top edge of the bag, handle relaxed.
- Strap length: tip to tip, plus the drop when worn on the shoulder.
Where replica dimensions go wrong
- Birkin depth. A body that tapes out at 18 cm deep is a 35 base wearing a 30 label.
- Mini sold as standard. Mini Kelly 20 listings sometimes photograph like a 25. The 5 cm gap shows in the handles and the strap, not just the body.
- Height with the flap folded down. That adds 1 to 2 cm and makes a smaller bag look bigger.
- Handle scale. A 25 with full-size 35 handles reads wrong in every photo, even when the body is fine.
- Hardware size. Locks, clochettes and turn knobs scale with the bag. Oversized hardware on a mini is the clearest tell.
What fits, size by size
- Birkin 25, Kelly 20 to 25: phone, cardholder, keys, lipstick, a slim notebook.
- Birkin 30, Kelly 28: add a long wallet and a small water bottle.
- Birkin 35, Kelly 32, Garden Party 30: a tablet or a 13 inch laptop in a sleeve.
- Birkin 40, Garden Party 36: a real day bag, laptop, light sweater and paperwork.
Before you order
Leather type changes the numbers more than people expect. Epsom and Togo hold shape; Clemence and Barenia slouch, which can cost a centimeter in height. Convert with 1 inch equals 2.54 cm if a supplier quotes inches, and ask for the depth last, since that is the figure most often rounded up. If the seller cannot show a tape measure against the bag, pick a different listing.