If you are asking whether a Dior bag strap is fake, start with the metal. That is the top pick because metalwork is the first place counterfeiters cut corners, and it is the one check you can run at a table, in a store or from a clear photo. On genuine Dior straps the CD links, lobster clasps and adjuster are cast with clean edges, even plating and lettering that sits flush with the surface. The other criteria in this guide, strap length, clasp geometry, stitching, canvas alignment and packaging, are secondary. Use them together with the hardware check, never instead of it.

1. Metalwork, plating and lettering

Run a thumb across the Dior lettering on the hardware. Real cast lettering feels level with the metal around it, while many fakes are stamped or glued, leaving ridges, a hollow feel or letters that sit slightly raised. The color of the plating should match across the clasps, links and rings. A mix of yellow-gold tones on one strap is a strong warning sign.

• Pros: no tools needed, works from a clear photo, and imitation metal is expensive to get right.
• Cons: you need a baseline for genuine hardware, and heavy wear can copy the look of poor plating.

Use this check first when you are looking at a strap in a resale listing with good close-ups. If the lettering is fuzzy in the photos, ask for more shots before you consider anything else.

2. Strap length, adjuster and clasp geometry

Dior straps are sold in specific lengths, and the adjuster hardware is shaped to match the strap width. Counterfeit straps often run a few centimeters short or long, and the adjuster is a generic buckle that pinches the leather or lets it slide. Check that the clasp opening matches the ring size and that the spring feels firm, not loose.

• Pros: length and geometry are hard to fake and easy to measure at home with a tape.
• Cons: aftermarket shortening or a replacement ring can make a real strap look wrong.

Measure before you judge. If a seller refuses to state the length in centimeters, treat that as a signal to walk away.

3. Stitching, edge paint and leather grain

Genuine straps use an even stitch count along each run, with the thread sitting flush and the holes not enlarged. Edge paint is thin, smooth and follows the strap without bubbles or drips. Leather grain is consistent across the strap, not patchy or plastic-looking under a light.

• Pros: stitching and edge paint reveal machine shortcuts that photos usually capture.
• Cons: a genuine strap that has been repaired can show mismatched thread.

This is the best second check for a strap you can hold in person. Use natural daylight, not a phone flash.

4. Canvas and Oblique pattern alignment

On canvas straps, the Oblique motif should line up with the strap edges and stay square to the hardware. Misaligned or stretched motifs, washed-out color and a coarse weave point to a fake. The underside should be clean, with no glue lines.

• Pros: pattern alignment is visible from across a room and hard to reproduce.
• Cons: partly hidden straps or folded straps hide the alignment problem.

Ask for a flat photo. If the pattern is cut off at the clasp, that is enough to stop.

5. Packaging, receipts and serial details

Dust bags, boxes and receipts are the weakest evidence because they are easy to copy or to buy separately. Treat them as supporting detail, not proof. What carries weight is whether the seller will state the strap length, show the hardware in focus, and accept a return.

• Pros: packaging can help date a strap and confirm the original colorway.
• Cons: fake packaging is common, and a real box proves nothing about the strap inside.

Use packaging only to confirm what the hardware and stitching already told you.

6. What to do next

Once you suspect a strap is fake, you have three sensible routes.

• Keep it: Pros, no extra cost if it is only a spare for a bag you already own. Cons, counterfeit goods can be seized by customs and resale is not possible.
• Have a genuine strap fitted: Pros, correct hardware and length for your bag. Cons, higher cost and a wait for the order.
• Buy a plain third-party strap: Pros, low cost and no trademark issue, and you can match leather color. Cons, it will not have CD hardware.

For a bag you plan to keep or resell, the fitted genuine strap is the route that holds value. For a work bag that takes abuse, a plain leather strap in a matching tone is the practical choice. Check the hardware first, then length and stitching, and let the paperwork only confirm what you already saw.