Paper & card guide
A US A7 invitation envelope is nominally 5 1/4 × 7 1/4 inches. That leaves only 1/4 inch total in each dimension around a 5 × 7 inch insert before seams, lining and thickness.
Nominal size reference
Every table uses nominal exterior width × height. International sizes lead with millimetres; US sizes lead with conventional fractional inches.
| Format | Native size (width × height) | Converted size (width × height) | Source checked | Context |
|---|---|---|---|---|
| A7 invitationUS announcement | 5 1/4 × 7 1/4 in5.25 × 7.25 in decimal | 133.35 × 184.15 mm | Neenah Paper ↗27 August 2026 | 5 × 7 inch card or photo |
The nominal difference is 0.25 inch (6.35 mm) across the full width and full height. If perfectly centred, that corresponds to 0.125 inch per edge before envelope construction is considered. Matcher “remaining” values always mean total unused width and height, not per edge.
A single thin photo and a layered invitation suite can share the same face dimensions but behave very differently. Ribbon, wax seals, rounded corners, liners and multiple pieces can make a nominal relationship impractical.
US A7 invitation envelope is unrelated to ISO A7 paper. Use the full regional description when ordering or exchanging specifications.
Nominal envelope dimensions describe the exterior format, not guaranteed usable internal space. Seams, lining, stock thickness, multiple pieces and manufacturing tolerances reduce practical room; sample before a bulk order or print run.