Side-by-Side Comparison
C-Series Envelopes (ISO 269)
C5 Envelope vs. C7/C6 Envelope
Comparing 2 standards across 9 specifications. 9 key differences identified.
Comparing:
C5 Envelope
C7/C6 Envelope
The C5 envelope is an ISO 269 standard postal envelope measuring 162 × 229 mm (6.38 × 9.02 inches). Designed to enclose an A4 sheet folded once in half (V-fold) or an unfolded flat A5 document (148 × 210 mm), it is standard for greeting cards, invitations, company invoices, and small paperback book shipments.
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.
Specification Comparison Table
9 Parameters| Parameter / Spec | ||
|---|---|---|
|
Width × Height (Metric)
|
162 × 229 mm | 81 × 162 mm |
|
Width × Height (Imperial)
|
6.38 × 9.02 in | 3.19 × 6.38 in |
|
Target Paper Pairing
|
A4 folded in half (148 × 210 mm) or flat unfolded A5 stationery | A5 paper folded horizontally in thirds (70 × 148 mm) |
|
Paper Insertion Clearance
|
+14 mm width / +19 mm height clearance | +11 mm height / +14 mm width clearance |
|
Primary Applications
|
Greeting cards, event invitations, invoices, corporate brochures | Confidential employee salary pay-slips, dividend warrant checks, gift certificates |
|
Geometric Mean Origin
|
Geometric mean of A5 (148×210 mm) and B5 (176×250 mm) | — |
|
Window Options
|
Standard left-hand or right-hand clear address window (45 × 90 mm) | — |
|
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 |