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Side Loading Expansion

Sideloading Expansion Stayflats Mailers – Flexible, Rigid Shipping Protection

Ship bulk or thicker documents and flat items securely with Sideloading Expansion Stayflats Mailers from SupplyLand — designed for extra capacity without compromising protection.

  • Rigid Chipboard Construction: Protects contents from bending, creasing, or corner damage.
  • Expandable Side-Loading Design: Accommodates thicker items while maintaining bend-free protection.
  • Secure Closure Options: Peel-and-seal or tab-lock closures keep contents safe and tamper-resistant.
  • Professional Appearance: Kraft or white finishes provide a polished, business-ready presentation.
  • Lightweight & Cost-Efficient: Offers strong protection without excessive postage weight.
  • Ideal for Flat or Bulk Items: Perfect for shipping documents, reports, photos, artwork, and small books.

Enhance your shipping operations with Sideloading Expansion Stayflats Mailers — the reliable choice for bulk or thicker flat item protection.


Sideloading Expansion Stayflats Mailers – Flexible, Rigid Shipping Protection

Ship bulk or thicker documents and flat items securely with Sideloading Expansion Stayflats Mailers from SupplyLand — designed for extra capacity without compromising protection.

  • Rigid Chipboard Construction: Protects contents from bending, creasing, or corner damage.
  • Expandable Side-Loading Design: Accommodates thicker items while maintaining bend-free protection.
  • Secure Closure Options: Peel-and-seal or tab-lock closures keep contents safe and tamper-resistant.
  • Professional Appearance: Kraft or white finishes provide a polished, business-ready presentation.
  • Lightweight & Cost-Efficient: Offers strong protection without excessive postage weight.
  • Ideal for Flat or Bulk Items: Perfect for shipping documents, reports, photos, artwork, and small books.

Enhance your shipping operations with Sideloading Expansion Stayflats Mailers — the reliable choice for bulk or thicker flat item protection.


4 items
Discounted Shipping $150+
Free Swag $150+

Active Filters

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Expansion Stayflats Mailers - 10 x 7 3/4 x 1", White, Self-Seal
Part #P1966
Width (in.)
10
Length (in.)
7 3/4
Depth (in.)
1
Expansion Stayflats Mailers - 12 1/2 x 9 1/2 x 1", White, Self-Seal
Part #P1967
Width (in.)
12 1/2
Length (in.)
9 1/2
Depth (in.)
1
Expansion Stayflats Mailers - 15 x 12 1/2 x 1", White, Self-Seal
Part #P1968
Width (in.)
15
Length (in.)
12 1/2
Depth (in.)
1
Expansion Stayflats Mailers - 17 x 14 x 1", White, Self-Seal
Part #P1969
Width (in.)
17
Length (in.)
14
Depth (in.)
1
Expansion Stayflats Mailers - 10 x 7 3/4 x 1", White, Self-Seal
Part #P1966
Width (in.)
10
Length (in.)
7 3/4
Depth (in.)
1
Expansion Stayflats Mailers - 12 1/2 x 9 1/2 x 1", White, Self-Seal
Part #P1967
Width (in.)
12 1/2
Length (in.)
9 1/2
Depth (in.)
1
Expansion Stayflats Mailers - 15 x 12 1/2 x 1", White, Self-Seal
Part #P1968
Width (in.)
15
Length (in.)
12 1/2
Depth (in.)
1
Expansion Stayflats Mailers - 17 x 14 x 1", White, Self-Seal
Part #P1969
Width (in.)
17
Length (in.)
14
Depth (in.)
1