| COMMON ENVELOPE NAME | STANDARD SIZE | MAXIMUM ENCLOSURE SIZE |
|---|
| 7 envelope | 3-3/4 x 6-3/4 inches | 3-1/2 x 6-1/2 inches |
| 8-5/8 envelope | 3-5/8 x 8-5/8 inches | 3-3/8 x 8-3/8 inches |
| 9 envelope | 3-7/8 x 8-7/8 inches | 3-5/8 x 8-5/8 inches |
| 10 envelope | 4-1/8 x 9-1/2 inches | 3-7/8 x 9-1/4 inches |
| COMMON ENVELOPE NAME | STANDARD SIZE | MAXIMUM ENCLOSURE SIZE |
|---|
| 7 envelope | 3-3/4 x 6-3/4 inches | 3-1/2 x 6-1/2 inches |
| 8-5/8 envelope | 3-5/8 x 8-5/8 inches | 3-3/8 x 8-3/8 inches |
| 9 envelope | 3-7/8 x 8-7/8 inches | 3-5/8 x 8-5/8 inches |
| 10 envelope | 4-1/8 x 9-1/2 inches | 3-7/8 x 9-1/4 inches |
Bright White are a versatile, light-weight, square flap envelope with a smooth finish. The A4 envelope size is a great invitation envelope and perfect for RSVP cards, announcements, notes, 4" x 6" photos and more. A4 Envelopes are commonly called 4x6 Envelopes because they are the best envelope for 4 x 6 cards.
| COMMON ENVELOPE NAME | STANDARD SIZE | MAXIMUM ENCLOSURE SIZE |
|---|
| 6-1/2 envelope | 6 x 9 inches | 5-3/4 x 8-3/4 inches |
| 6-5/8 envelope | 6 x 9-1/2 inches | 5-3/4 x 9-1/4 inches |
| 9 envelope | 8-3/4 x 11-1/2 inches | 8-1/2 x 11-1/4 inches |
| 9-1/2 envelope | 9 x 12 inches | 8-3/4 x 11-3/4 inches |
They have a standard size of 4 1/8 inches high by 9 1/2 inches long. The #10 envelopes are designed to hold a standard 8 1/2 x 11-inch piece of paper folded into three sections, making them ideal for offices. They are perfect for sending invoices, checks, or other business letters.
The A7 envelope size is the perfect invitation envelope and also great for mailings, holding 5" x 7" photos, invitations, announcements and more. A7 Envelopes are commonly called 5x7 Envelopes because they are the best envelope for 5 x 7 cards.
The DL envelope is the most common envelope used in business. DL is short for 'Dimension Lengthwise', however it was previously known as DIN Lang in Germany where it originated in the 1920s. An A4 sheet of paper folded three times, parallel to its smaller sides, will fit into a DL envelope.
A standard DL envelope measures 110mm x 220mm. This is what most people consider a "letter envelope" and fits A4 paper folded into thirds. Business 'With Compliments' slips are designed to fit inside a DL envelope and usually measure 210mm x 99mm.
Further Information
| Format | Width × Height (mm) | Width × Height (in) |
|---|
| B4 | 353 × 250 mm | 13.9 × 9.8 in |
| B5 | 250 × 176 mm | 9.8 × 6.9 in |
| B6 | 176 × 125 mm | 6.9 × 4.9 in |
| C3 | 458 × 324 mm | 18 × 12.8 in |
The words large envelopes and flats are used interchangeably. Whatever you call them, flats must: Have one dimension that is greater than 6-1/8
inches high OR 11-½
inches long OR ¼
inch thick. Be no more than 12
inches high x 15
inches long x ¾
inch thick.
Sizes for Large Envelopes and Flats.
| Dimension | Minimum* | Maximum |
|---|
| Thickness | 1/4 inch | 3/4 inch |
Envelope Size Guide DL C0 C1 C2 C3 C4 C5 C6 C7 C8 C9 C10
| Envelope Size | mm (w x h) | in (w x h) |
|---|
| DL | 220 mm x 110 mm | 8.66 inches x 4.33 inches |
| C0 | 917 mm x 1297 mm | 36.1 inches x 51.5 inches |
| C1 | 648 mm x 917 mm | 25.5 inches x 36.1 inches |
| C2 | 458 mm x 648 mm | 18 inches x 25.5 inches |
