Side-by-Side Comparison
A-Series (ISO 216)
A2 vs. A9
Comparing 2 standards across 8 specifications. 7 key differences identified.
Comparing:
A2
A9
A2 is an ISO 216 standard paper size measuring 420 × 594 mm (16.5 × 23.4 inches), with a surface area of 0.250 square meters (one quarter of A0). Providing a balanced medium-large format, it is standard for fine-art photographic prints, architectural site overviews, large wall calendars, and retail window display posters.
A9 is an ISO 216 standard paper size measuring 37 × 52 mm (1.46 × 2.05 inches), with a surface area of 1/512 square meter. Created by cutting an A8 sheet in half, it is standard for miniature barcode labels, commemorative postage stamps, bookkeeper index tabs, and food expiration stickers.
Specification Comparison Table
8 Parameters| Parameter / Spec | ||
|---|---|---|
|
Width × Height (Metric)
|
420 × 594 mm | 37 × 52 mm |
|
Width × Height (Imperial)
|
16.5 × 23.4 in | 1.46 × 2.05 in |
|
Nominal Surface Area
|
0.250 m² (250,000 mm²) | 0.001953125 m² (1/512 m² — 1,924 mm²) |
|
Exact Aspect Ratio
|
1 : √2 (1 : 1.4142) | 1 : √2 (1 : 1.4142) |
|
Weight of Standard 80 gsm Sheet
|
20.0 grams | 0.156 grams |
|
Primary Applications
|
Artistic photographic prints, desk calendars, sales territory charts, school classroom diagrams | Postage stamps, small jar adhesive labels, index divider tabs, coupon tokens |
|
Halving Relationship
|
Cut in half yields 2 sheets of A3 | — |
|
A4 Imposition Yield
|
— | 32 individual A9 pieces per single A4 master sheet |