How-to guide
How to check the quality of bags
A short, structured inspection catches most problems before bags reach customers.
Quick answer
Check stitching density and seam finishing, handle and strap attachment, zip operation, fabric weight against the spec, print or logo quality, measurements against the approved size, and do a simple load test — always comparing with the approved sample.
Updated by the Vago team
Key takeaways
- Compare with the approved sample
- Inspect stitching
- Test hardware
- Measure
- Load test
Step by step
Compare with the approved sample
Lay a production piece next to the sample and check material, colour, size and branding.
Inspect stitching
Look for even stitches, no skipped stitches and bar-tacks at handles and strap ends.
Test hardware
Run every zip end to end, open and close buckles and check D-rings and hooks.
Measure
Check width, height, depth and handle drop against the specification.
Load test
Fill the bag with the expected weight and lift it by the handles a few times.
Check packing
Confirm quantity per carton, carton marking and that bags are clean and folded properly.
Tips
- Use a random sample from several cartons, not just the top one
- Agree acceptance criteria (such as an AQL level) before production
Mistakes to avoid
- Inspecting only after the full payment is made
- Checking only the outside of the bag and not the seams inside
Terms used in this guide
- AQL inspection
- A sampling method for inspecting a bulk order's quality.
- Bar tacking
- Dense reinforcement stitching at points under stress.
- Pre-production sample (PPS)
- The final sample approved before bulk production starts.
- Load test
- A check that a bag and its handles carry a stated weight without seams or handles failing.
- Seam allowance
- The strip of fabric between the stitch line and the cut edge.
Terms explained
Trade terms used on this page, in plain language.
- Bar tacking
- Dense reinforcement stitching at points under stress.
- Pre-production sample (PPS)
- The final sample approved before bulk production starts.
- Zip size (#5, #8, #10)
- The number describing a zip's tooth width — higher numbers are stronger.
- D-ring
- A D-shaped metal or plastic ring used to attach straps.
- Binding tape
- Tape sewn over raw inner seams to finish them neatly.
- Piping
- A corded edge trim that defines a bag's shape.
Questions buyers ask
Something else? Ask on WhatsApp and the production team will reply.
What is AQL in bag inspection?
AQL is a statistical sampling standard that defines how many pieces to check and how many defects are acceptable for a lot size.
Request a quote for custom bags
Share quantity, size, material and branding. We reply with specifications, MOQ and pricing, and arrange a sample first.