Square
Square envelopes are frequently used for advertisement, public notice, specialty greeting cards and invitations.
| Size | Dimension (inch) | Dimension (mm) |
|---|---|---|
| 5 | 5.00 x 5.00 in | 127.00 x 127.00 mm |
| 5 1/2 | 5.50 x 5.50 in | 139.70 x 139.70 mm |
| 6 | 6.00 x 6.00 in | 152.40 x 152.40 mm |
| 6 1/2 | 6.50 x 6.50 in | 165.10 x 165.10 mm |
| 7 | 7.00 x 7.00 in | 177.80 x 177.80 mm |
| 7 1/2 | 7.50 x 7.50 in | 190.50 x 190.50 mm |
| 8 | 8.00 x 8.00 in | 203.20 x 203.20 mm |
| 8 1/2 | 8.50 x 8.50 in | 215.90 x 215.90 mm |
| 9 | 9.00 x 9.00 in | 228.60 x 228.60 mm |
| 9 1/2 | 9.50 x 9.50 in | 241.30 x 241.30 mm |
Square envelopes attract attention with their modern square flap and long lasting lateral seam construction.