Types of Envelopes

Commercial Envelopes

Business correspondence envelopes come with a variety of flap styles and sizes.

The most common is the number 10 with either a commercial flap or a square flap. These envelopes are designed for machine insertion making them an ideal and efficient choice for direct mail, invoices, checks and statements. Commercial envelopes are also often used for letterhead and personal correspondence. They open along the top edge and have diagonal seams.

Square Flap

Square flap business envelopes are often used to add a contemporary flair to correspondence. These envelopes are well suited for engraving, thermography and other printing processes, but are not recommended for automatic insertion equipment.

Policy Flap

With the opening on the end of the envelope, policy envelopes are often used for custom marketing material and invitations.

DL International

Engineered to ensure maximum opacity which provides for a more confidential presentation.

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Commerical Envelope Sizes

Item	Inches	Millimeters
6 3/4	6 1/2 x 3 5/8	165 x 92
Monarch	7 1/2 x 3 7/8	190 x 98
No. 9 Commercial	8 7/8 x 3 7/8	225 x 98
No. 10 Commercial	9 1/2 x 4 1/8	241 x 105
No. 10 Square	9 1/2 x 4 1/8	241 x 105
No. 10 Peel ≈ Seal	9 1/2 x 4 1/8	241 x 105
No. 10 Commercial (Standard Poly Window)	9 1/2 x 4 1/8	241 x 105
No. 10 Policy	9 1/2 x 4 1/8	241 x 105
No. 10 Commercial (Canadian Window)	9 1/2 x 4 1/8	241 x 105
DL	8.66 x 4.33	220 x 110

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