C7/C6 Envelope vs. DL Envelope
Comparing 2 standards across 10 specifications. 10 key differences identified.
The C7/C6 envelope is an ISO 269 hybrid envelope format measuring 81 × 162 mm (3.19 × 6.38 inches). Having the height of a C7 envelope and the width of a C6 envelope, it is engineered specifically to hold an A5 sheet folded in thirds, widely used for confidential payroll slips, dividend checks, and gift vouchers.
The DL envelope (Dimension Lengthwise / DIN Lang, standardized under ISO 269 and DIN 678) measures 110 × 220 mm (4.33 × 8.66 inches). Engineered specifically to hold an A4 sheet folded horizontally in thirds (Z-fold or C-fold), it is the dominant standard across Europe and most of the world for automated corporate billing, bank statements, and commercial direct-mail advertising.
Specification Comparison Table
10 Parameters| Parameter / Spec | ||
|---|---|---|
|
Width × Height (Metric)
|
81 × 162 mm | 110 × 220 mm |
|
Width × Height (Imperial)
|
3.19 × 6.38 in | 4.33 × 8.66 in |
|
Target Paper Pairing
|
A5 paper folded horizontally in thirds (70 × 148 mm) | Standard A4 sheet folded in thirds horizontally (99 × 210 mm) |
|
Paper Insertion Clearance
|
+11 mm height / +14 mm width clearance | +11 mm height / +10 mm width clearance |
|
Hybrid Geometry Origin
|
Height of C7 (81 mm) combined with Width of C6 (162 mm) | — |
|
Common Security Features
|
Dark opaque blue/black cross-hatch security pattern interior print | — |
|
Primary Applications
|
Confidential employee salary pay-slips, dividend warrant checks, gift certificates | — |
|
Address Window Position
|
— | Standard DIN window: 45 × 90 mm, located 20 mm from left, 15 mm from bottom |
|
Automated Insertion Standard
|
— | High-speed optical inserter machine standard (thousands of pieces/hour) |
|
Comparison to US #10
|
— | DL is 110 × 220 mm; US #10 is 4.125 × 9.5 in (104.8 × 241.3 mm) |