Keep internal mail organized and routed efficiently with these 13" x 10" blue inter-department envelopes. String and button closure allows repeated use, while pre-printed columns for Date, Deliver To, Department, Sent By, and Department track up to 31 entries per envelope. Buy by the case of 100.
In Stock SKU: EN1097

13" x 10" Blue Inter-Department Envelopes - String Closure, Case of 100

Keep internal mail organized and routed efficiently with these 13" x 10" blue inter-department envelopes. String and button closure allows repeated use, while pre-printed columns for Date, Deliver To, Department, Sent By, and Department track up to 31 entries per envelope. Buy by the case of 100.

$97.81 / CASE (100 PER CASE)
Order timing and shipping options show at checkout
Delivery shown at checkout
Confirm this specSKU EN1097

13 in x 10 in mailers. Commonly used for documents, catalogs, samples, and flat pack shipments.

Size
13 x 13 in
Material
Paper Stock
Color
Blue
Sold as
CASE (100 PER CASE)
Freight class
78
Material
Paper Stock
Dimensions
10 x 13 inches
Color
Blue
Good fit for

Ideal for mid-size to enterprise mailrooms managing high-volume interdepartmental document routing. These 10 x 13" blue inter-department envelopes keep internal mail organized and color-coded for quick identification, making them use for facilities requiring efficient document tracking across multiple departments while maintaining professional presentation.

Check before ordering

Confirm usable inside dimensions, closure type, color, and pack quantity.

Buying a larger quantity, matching this to an existing SKU, or setting up a repeat order?

Request quote help
Secure checkout | Delivery shown at checkout |

Best For

Ideal for mid-size to enterprise mailrooms managing high-volume interdepartmental document routing. These 10 x 13" blue inter-department envelopes keep internal mail organized and color-coded for quick identification, making them use for facilities requiring efficient document tracking across multiple departments while maintaining professional presentation.

How to Choose the Right Packaging

Each envelope features a durable string-and-button closure enabling 20+ reuses per envelope, reducing per-use costs significantly. Pre-printed tracking columns (Date, Deliver To, Department, Sent By, Department) accommodate 31 routing entries per side, eliminating manual data entry and ensuring shipping compliance with clear accountability chains.

Specs at a Glance

MaterialPaper Stock
Dimensions10 x 13 inches
ColorBlue
Closure TypeString and Button
RecyclableYes
Common Use Cases
  • Inter-departmental document routing in corporate offices Color-coded mail distribution for special handling identification High-volume mailroom operations requiring reusable solutions HR and finance document circulation with audit trail tracking Legal department internal file transfers with dated accountability
What You'll Receive
  • Case of 100 pre-printed blue inter-department envelopes String-and-button closures pre-installed on all envelopes
Shipping & Packaging

Ships in bulk case packaging (100 envelopes per case) designed for mailroom storage and immediate deployment. Standard industrial packaging protects envelope stock during transit while minimizing excess dimensional weight charges.

Frequently Bought Together

Related supplies

Frequently Asked Questions

The durable string-and-button closure system supports 20+ reuses per envelope, significantly reducing per-use costs compared to disposable alternatives. This makes them ideal for cost-conscious facilities with consistent interdepartmental routing needs.

Each envelope displays 5 columns (Date, Deliver To, Department, Sent By, Department) with space for 31 routing entries printed on one side. This eliminates manual labeling and ensures consistent, audit-compliant documentation of internal mail circulation.

Blue color-coding enables quick visual identification and special handling prioritization at a glance. This accelerates mailroom sorting speeds and reduces misrouting errors, particularly valuable in high-volume operations managing multiple document types simultaneously.

The 10 x 13" format accommodates standard letter-size documents (8.5 x 11"), legal-size documents (8.5 x 14"), and smaller internal reports. This versatile sizing handles most interdepartmental routing needs without requiring multiple envelope SKUs.

Technical Specifications

Closure TypeString and Button
RecyclableYes
Color Blue
Strength / Material Paper Stock
Dimensions (Internal) 13"" × 13"" (L × W × H)

Product Downloads

Shipping Information

Outer Carton Dimensions

16.0" × 10.5" × 6.0" (L × W × D)

Unit of Measure

CASE

Qty Per Shipping Unit

100 PER CASE

LTL Freight Class

Class 78

Delivery Method

Shown at checkout

ORDER SUPPORT

Product Support

We aim to show product specs, case quantities, and availability clearly. Contact support if an item does not match the listed product details.

Secure checkout LTL freight available on case/skid orders

Buyer guides

Pick the right material, size, and gauge before you order.

Related products Shop mailers and envelopes

Compare usable size, padding, material, closure, and case quantity.

 Buying route Compare mailer vs box

Use this guide when item thickness or edge protection affects fit.

Corrugated Box Buying Guide

How to pick Single, Double, or Triple wall for your weight and stack requirements.

Read Guide →

How to Measure for Shipping

Measure inside and outside dimensions before choosing shipping supplies or estimating DIM-weight costs.

Read Guide →