What Does DL Stand for in Paper Sizes?

envelope image by Marek Kosmal from Fotolia.com

With so many different common paper sizes around, it is hard to keep track of them. Though it's smaller than the standard letter-sized paper, a DL-sized paper has many diverse uses.

Paper Measurements

A DL-sized paper measures 99mm x 210mm. Therefore it's the equivalent of an A4 (standard US letter-sized) paper folded into thirds. It's also equivalent to an A5 piece of paper folded lengthwise in half. (Resource 2)

Envelope Measurements

A DL envelope, however, is typically is 110mm x 220mm or 4 5/16 in. x 8 1/16 in. Therefore, it is often thought of as the standard "business envelope" since it can easily hold a standard U.S. business letter(A4-sized paper) folded into thirds. (Resource 1)


The DL size usually refers to an envelope. However, DL-sized paper may be used for common announcemets such as invitations, letter drop boxes, wedding announcements, or greeting cards meant to hold money. (Resource 3)

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