A8
A-Series (ISO 216) · 7 specs
Direct Answer
A8 is an ISO 216 standard paper size measuring 52 × 74 mm (2.05 × 2.91 inches), with a surface area of 1/256 square meter. Approximately matching the footprint of standard bank payment cards, it is standard for European business cards, loyalty stamps, retail price tags, and transit ticket stubs.
Source: ISO 216:2007 (DIN 476-1) · Last reviewed Aug 28, 2026
Specs
| Width × Height (Metric) | 52 × 74 mm |
| Width × Height (Imperial) | 2.05 × 2.91 in |
| Nominal Surface Area | 0.00390625 m² (1/256 m² — 3,848 mm²) |
| Exact Aspect Ratio | 1 : √2 (1 : 1.4142) |
| Weight of Standard 80 gsm Sheet | 0.3125 grams |
| Comparison to ISO 7810 ID-1 | Slightly smaller than credit card size (85.60 × 53.98 mm) |
| Primary Applications | European calling cards, retail product price swing tags, barcode labels, flash cards |
Calling Cards and Retail Hang Tags
In Central Europe, A8 is the traditional format for calling cards and retail clothing price tags. Sixteen A8 tags are cut from a single sheet of A4 cardstock without any edge trim waste.
Comparison with Standard Business Cards
While modern international credit cards and business cards follow ISO/IEC 7810 ID-1 (85.60 × 53.98 mm), A8 (74 × 52 mm) maintains the mathematically pure √2:1 aspect ratio, making it slightly shorter and narrower.