Ideal for e-commerce businesses, logistics companies, and distributors who need to securely attach invoices and packing lists to shipments. These 4 1/2" x 6" red poly envelopes keep documents protected and visible during transit while meeting shipping compliance requirements for document inclusion.
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How to Choose the Right Packaging
Specs at a Glance
| Material | 2 Mil Polyethylene (Poly) |
| Dimensions | 4 1/2" x 6" |
| Color | Red |
| Quantity per Case | 1,000 Envelopes |
| Recyclable | Yes |
Common Use Cases
- Attaching invoices to outbound shipments Securing packing lists on parcels Protecting documentation during multi-leg shipping Compliance with carrier requirements for document visibility Reducing lost or damaged paperwork in fulfillment centers
What You'll Receive
- 1,000 pre-printed "Invoice Enclosed" envelopes (4 1/2" x 6") Adhesive backing for secure package attachment
Shipping & Packaging
Frequently Bought Together
Bundle & Save 5%Frequently Asked Questions
Yes. The 2 mil polyethylene material provides moisture protection to keep invoices and packing lists dry during weather exposure or handling in humid environments.
These envelopes come pre-printed with "Invoice Enclosed" text. If you need custom printing, we recommend our blank envelope options. The adhesive backing makes them compatible with standard package application methods.
2 mil poly provides cost-effective protection for standard shipping conditions while remaining flexible and easy to apply. Thicker materials offer additional durability for high-handling or harsh environments, but increase per-unit costs.
With 1,000 envelopes per case, calculate your monthly invoice volume and order accordingly. Case pricing provides significant per-unit savings compared to smaller quantities, making bulk ordering more cost-efficient for regular shipping operations.
Technical Specifications
| Material | 2 Mil Polyethylene (Poly) |
| Dimensions | 4 1/2" x 6" |
| Color | Red |
| Quantity per Case | 1,000 Envelopes |
| Recyclable | Yes |
| Color | Red |
| Strength / Material | 2 Mil Poly |
| Dimensions (Internal) | 4 1/2"" × 6"" (L × W × H) |
Product Downloads
Shipping Information
Outer Carton Dimensions
10.0" × 7.0" × 4.5" (L × W × D)
Unit of Measure
CASE
Qty Per Shipping Unit
1000 PER CASE
LTL Freight Class
Class 60
Carrier Eligibility
UPS Ground & Freight Eligible
TRUST & RELIABILITY
Product Support
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Buyer guides
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