Side-by-Side Comparison
A-Series (ISO 216)
A4 vs. A8
Comparing 2 standards across 9 specifications. 8 key differences identified.
Comparing:
A4
A8
A4 is the international standard paper format defined by ISO 216, measuring 210 × 297 mm (8.27 × 11.69 inches). Utilized by over 140 countries representing approximately 95% of the world's population, it is the universal standard for business letters, official contracts, academic papers, magazine publishing, and desktop office printers.
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.
Specification Comparison Table
9 Parameters| Parameter / Spec | ||
|---|---|---|
|
Width × Height (Metric)
|
210 × 297 mm | 52 × 74 mm |
|
Width × Height (Imperial)
|
8.27 × 11.69 in | 2.05 × 2.91 in |
|
Nominal Surface Area
|
0.0625 m² (1/16 m² — 62,500 mm²) | 0.00390625 m² (1/256 m² — 3,848 mm²) |
|
Exact Aspect Ratio
|
1 : √2 (1 : 1.4142) | 1 : √2 (1 : 1.4142) |
|
Weight of Standard 80 gsm Sheet
|
5.0 grams exactly | 0.3125 grams |
|
Weight of 500-Sheet Ream (80 gsm)
|
2.50 kg (5.51 lbs) | — |
|
Postal Envelope Pairings
|
C4 (unfolded), C5 (folded once), C6 (folded twice), DL (folded in thirds) | — |
|
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 |