| Country of Origin | Slovakia |
| Depth (mm) | 384 |
| Height (mm) | 384 |
| Width (mm) | 240 |
| Type | Window Envelopes |
| Manufacturer | Blake Envelopes |
| Brand | Blake Environmental |
| Size | C4 |
| Minimum Recyclable Content (%) | 70 |
| Colour | White |
| Minimum Biodegradable Content (%) | 70 |
| Material | Paper |
| Closure | Self Seal |
| Eco-Aware | Yes |
| Recycled Product | 100% Recycled Material |
| Country of Harvest | Slovakia |
| Item Gauge (gsm) | 100 |
| Grammage | 100gsm |
| Minimum Recycled Content (%) | 100 |
| Dimensions | 324x229mm |
| Environment Support | FSC® Certified Product - Mix |
| Gusset | No Gusset |
| Envelope Closure | Self Seal |
| Envelope Size | C4 |
| Envelope Window Depth | 40 |
| Envelope Window Position | B 40 x 105mm - 24mm in 213mm up |
| Envelope Window Position In | 24 |
| Envelope Window Position Up | 213 |
| Envelope Window Width | 105 |
| Envelope Grade | Medium Weight |
| Window Position | 213mm Up 24mm From Left |
| Window Size | 40x105mm |
| Flap Position | Short Edge |
| FSC % | 80 |
| Envelope Colour | White |