US Envelope Paper Sizes
Chinese D series (GB/T 148-1997). Long side is twice the short side of the next smaller size.
US Envelope Paper Sizes — dimensions in mm and inches
| Format | mm | inches |
|---|---|---|
| D6 | 92 × 126 | 3.62 × 4.96 |
| D5 | 130 × 184 | 5.12 × 7.24 |
| D4 | 188 × 260 | 7.4 × 10.24 |
| D3 | 264 × 376 | 10.39 × 14.8 |
| D2 | 380 × 528 | 14.96 × 20.79 |
| D1 | 532 × 760 | 20.94 × 29.92 |
| D0 | 764 × 1064 | 30.08 × 41.89 |