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Rigid Stay Flat Mailer — packaging format from CosunPack
CS-0140

Rigid Stay Flat Mailer

Rigid Stay Flat Mailer: Mailing packaging sized for your product and fulfillment process. Confirm the material, protection level, print, and closure for your distribution route.

Product Highlights

  • Material grade selected for the named mailer format
  • Dimensions matched to the packed product
  • Closure and seams reviewed for the fulfillment workflow
  • Print and handling performance checked against the approved sample
Send Full Spec

Craftsmanship & Production

Production steps and quality checks for this packaging format, coordinated across our printing workshops and specialized production network.

Paperboard is printed, cut, creased, and assembled into the approved stay-flat mailer. Board stiffness, closure, and packed-product fit are checked.

Customization Options

Review the available options for Rigid Stay Flat Mailer with our team. These are the requirements to confirm:

  • Material grade
  • Mailer dimensions
  • Print and branding
  • Closure design

Specification Planning — Rigid Stay Flat Mailer

Review these material and process options for the selected structure. Your quotation confirms the exact specification for your project.

MaterialRigid paperboard
StructureMailer construction, opening, and closure confirmed against the approved sample
Size RangeDimensions or capacity confirmed against your product and selected tooling
ThicknessMaterial thickness or weight confirmed in the approved specification
PrintingPrinting process confirmed for the selected substrate
FinishingClosure and surface finish confirmed for the selected material
MOQQuoted per material, structure, print process, and order quantity
Sampling Lead TimeConfirmed after the artwork, structure, and tooling review
Production Lead TimeConfirmed after sample approval and production planning
Typical ApplicationsE-commerce shipping, apparel, subscription boxes

Options shown for planning; final parameters are agreed in writing with your quotation and approved sample.

Before You Order

Rigid Stay Flat Mailer FAQ

Practical answers on choosing the structure, avoiding common problems, and confirming the right specification for your product.

How rigid does a stay-flat mailer need to be?

Define acceptable bending for the contents and supply the full document or artwork stack. Compare samples for face stiffness, edge protection and fit in your actual route. Stay-flat is a format objective; the name alone does not guarantee that an unsupported item cannot bend.

Technical references
Can extra empty space cause corner damage?

Check whether the contents slide into the closure or strike exposed edges. Supply the largest and smallest document sizes and evaluate retention or backing as needed. Test the complete arrangement so a stiff outer envelope does not mask movement damage inside.

Technical references
How should the opening strip be positioned?

Trial opening with the intended contents close to the envelope edge. Ensure the user can follow the strip without damaging prints or documents and can withdraw the stack cleanly. Specify insertion depth and safe artwork margins on the approved sample drawing.

Technical references
What should we send for a stay-flat specification?

Provide contents dimensions, thickness, fragility and presentation requirements, including whether corners or surfaces must remain pristine. State the delivery route and any return requirement. Agree packed acceptance criteria and evaluate production-equivalent samples rather than selecting board solely by nominal weight.

Technical references

Have a different application? Share your requirements for this model.

One Partner for Your Complete Packaging

Source packaging from China with one team, from product-led development to delivery. Share your product or idea, component list, quantity, and destination—we will help define the next steps.

Project-specific quotationNDA available before file sharingReply target: one business day