Envelope Size Chart
✉️ Commercial / Official Sizes (Commercial Flap, unless noted)
| Envelope No. | Inches | Millimeters |
|---|---|---|
| 6 1/4 | 3 1/2 x 6 | 89 x 152 |
| 6 3/4 | 3 5/8 x 6 1/2 | 92 x 165 |
| 7 | 3 3/4 x 6 3/4 | 95 x 171 |
| Monarch (Pointed Flap) | 3 7/8 x 7 1/2 | 98 x 191 |
| 8 5/8 | 3 5/8 x 8 5/8 | 92 x 219 |
| 9 | 3 7/8 x 8 7/8 | 98 x 225 |
| 10 (also Square Flap) | 4 1/8 x 9 1/2 | 105 x 241 |
| 11 (also Square Flap) | 4 1/2 x 10 3/8 | 114 x 264 |
| 12 (also Square Flap) | 4 3/4 x 11 | 121 x 279 |
| 14 (also Square Flap) | 5 x 11 1/2 | 127 x 292 |
📄 Booklet Envelopes (Wallet Flap)
| Envelope No. | Inches | Millimeters |
|---|---|---|
| 3 | 4 3/4 x 6 1/2 | 121 x 165 |
| 5 | 5 1/2 x 8 1/8 | 140 x 206 |
| 6 | 5 3/4 x 8 7/8 | 146 x 225 |
| 6 1/2 | 6 x 9 | 152 x 229 |
| 6 5/8 | 6 x 9 1/2 | 152 x 241 |
| 6 3/4 | 6 1/2 x 9 1/2 | 165 x 241 |
| 7 1/4 | 7 x 10 | 178 x 254 |
| 7 1/2 | 7 1/2 x 10 1/2 | 191 x 267 |
| 9 | 8 3/4 x 11 1/2 | 222 x 292 |
| 9 1/2 | 9 x 12 | 229 x 305 |
| 10 | 9 1/2 x 12 5/8 | 241 x 321 |
| 13 | 10 x 13 | 254 x 330 |
🪟 Window Envelopes (Commercial Flap)
| Envelope No. | Inches | Millimeters |
|---|---|---|
| 6 1/4 | 3 1/2 x 6 | 89 x 152 |
| 6 3/4 | 3 5/8 x 6 1/2 | 92 x 165 |
| 7 | 3 3/4 x 6 3/4 | 95 x 171 |
| Monarch | 3 7/8 x 7 1/2 | 98 x 191 |
| 8 5/8 | 3 5/8 x 8 5/8 | 92 x 219 |
| 9 | 3 7/8 x 8 7/8 | 98 x 225 |
| 10 | 4 1/8 x 9 1/2 | 105 x 241 |
| 11 | 4 1/2 x 10 3/8 | 114 x 264 |
| 12 | 4 3/4 x 11 | 121 x 279 |
| 14 | 5 x 11 1/2 | 127 x 292 |
📨 Announcement Envelopes (Square Flap)
| Envelope No. | Inches | Millimeters |
|---|---|---|
| A-2 | 4 3/8 x 5 3/4 | 111 x 146 |
| A-6 | 4 3/4 x 6 1/2 | 121 x 165 |
| A-7 | 5 1/4 x 7 1/4 | 133 x 184 |
| A-8 | 5 1/2 x 8 1/8 | 140 x 206 |
| A-9 | 5 3/4 x 8 3/4 | 146 x 222 |
| A-10 | 6 x 9 1/2 | 152 x 241 |
| Slimline | 3 7/8 x 8 7/8 | 98 x 225 |
💌 Baronial Envelopes (Pointed Flap)
| Envelope No. | Inches | Millimeters |
|---|---|---|
| 4 | 3 5/8 x 5 1/8 | 92 x 130 |
| 5 | 4 1/8 x 5 1/2 | 105 x 140 |
| 5 1/2 | 4 3/8 x 5 3/4 | 111 x 146 |
| 6 | 4 3/4 x 6 1/2 | 121 x 165 |
| Lee | 5 1/4 x 7 1/4 | 133 x 184 |
Looking for the right envelope size for your greeting card, brochure, or mailing project? This complete chart covers standard envelope dimensions by style and flap type—including commercial, booklet, announcement, baronial, and window envelopes. Use this guide to match your paper projects with the perfect envelope for mailing, gifting, or display. All envelope sizes listed are available on mcgpaper.com.