Case Study: Custom Shell Button for an Amazon Private Label Seller in Vietnam

Shell Button for an Amazon Private Label Seller in Vietnam

An Amazon Private Label Seller approached us with a shell button requirement for the Vietnam market. The brief was specific: a defined look, a hard launch date and a unit cost that had to survive freight and duty. This case study records what was specified, what went wrong in sampling and how the bulk order was delivered.

The challenge

• Shrinkage that only showed up after the first wash
• A zipper puller that broke under pull test at the warehouse
• Shade drift between the approved lab dip and the bulk lot

What we specified

How it was resolved

1. We rebuilt the specification around Glass and locked the tolerance before bulk.
2. The finish was moved to Antique Brass Plating after strike-off tests showed better durability.
3. A pre-production sample was approved and retained as the golden reference.
4. Production ran with in-line inspection and a mid-run photo report.
5. Cartons were packed to the client's own barcode and ratio specification.

Result

• 5,000 pieces delivered inside the 8-week window.
• Unit cost held within 3.0% of the original quotation.
• Inspection-related rejection stayed under 1.0%.
• The specification is now on file, so reorders reproduce the approved sample.

What we would repeat

Fix the specification count early. Adding variants after production starts is the most expensive change a client can request.

Planning something similar?

If you are comparing suppliers, send us the spec they quoted against. We will quote the same spec and show you where the difference sits.