Envelopes and Folders - The Graphic Design: Reference and Specification - page 84

business announcement and baronial

i n t e r n at i o n a l e n v e l o p e s i z e s
International, or ISO, envelope sizes are
based on folding A4 (210 × 297 mm, let-
terhead sized) paper into an envelope. Other
sizes and how they fit when folded into the
various ISO envelope sizes are shown below.

Formal envelopes with deep, pointed
flaps. Widely used for invitations, formal
announcements, greeting, and social
cards.

Item/No. Size (inches) Size (millimeters)

Gladstone 3 9 ⁄ 16 × 5 9 ⁄ 16 90.500 × 141.300

4 Baronial 3 5 ⁄ 8 × 5 1 ⁄ 8 92.075 × 130.175

5 Baronial 4 1 ⁄ 8 × 5 1 ⁄ 8 104.775 × 130.175

An A4 folded twice into thirds fits in a DL envelope.

5 1 ⁄ 4 4 1 ⁄ 4 × 5 1 ⁄ 4 107.95 × 133.35

Baronial
53 4 1 ⁄ 8 × 6 1 ⁄ 4 104.775 × 158.75

5 1 ⁄ 2 4 3 ⁄ 8 × 5 5 ⁄ 8 111.125 × 142.875

Baronial
6 Baronial 5 × 6 1 ⁄ 4 127 × 158.75

110 5 × 7 1 ⁄ 4 127 × 180.975

An A4 folded once fits in a C5 envelope.

Lee 5 1 ⁄ 4 × 7 1 ⁄ 4 133.35 × 184.15

137 5 1 ⁄ 2 × 8 1 ⁄ 2 139.7 × 215.9

coin

An A5 folded once fits in a C6 envelope.

Used for paper currency as well as coins
by banks and corporations.

Item/No. Size (inches) Size (millimeters)

00 1 11 ⁄ 16 × 2 3 ⁄ 4 42.875 × 69.85

An A5 folded once fits in a DL envelope.

1 2 1 ⁄ 4 × 3 1 ⁄ 2 57.15 × 88.9

3 2 1 ⁄ 2 × 4 1 ⁄ 4 63.5 × 107.95

4 3 × 4 1 ⁄ 2 76.2 × 114.3

5 2 7 ⁄ 8 × 5 1 ⁄ 4 73.025 × 133.35

5 1 ⁄ 2 3 1 ⁄ 4 × 5 1 ⁄ 2 88.9 × 139.7

6 3 3 ⁄ 8 × 6 85.725 × 152.4

7 3 1 ⁄ 2 × 6 1 ⁄ 2 88.9 × 165.1

An A4 folded twice into quarters fits in a C6 envelope.