Side-by-Side Comparison
A-Series (ISO 216)
A1 vs. A9
Comparing 2 standards across 8 specifications. 7 key differences identified.
Comparing:
A1
A9
A1 is an ISO 216 standard paper size measuring 594 × 841 mm (23.4 × 33.1 inches), with an exact surface area of 0.500 square meters (half of A0). It is the premier standard format for architectural blueprints, structural engineering drawings, municipal planning maps, and large-format flipcharts.
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)
|
594 × 841 mm | 37 × 52 mm |
|
Width × Height (Imperial)
|
23.4 × 33.1 in | 1.46 × 2.05 in |
|
Nominal Surface Area
|
0.500 m² (500,000 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
|
40.0 grams | 0.156 grams |
|
Primary Applications
|
Architectural blueprints, conference presentation boards, large flipcharts, theatrical event posters | Postage stamps, small jar adhesive labels, index divider tabs, coupon tokens |
|
Halving Relationship
|
Cut in half yields 2 sheets of A2 | — |
|
A4 Imposition Yield
|
— | 32 individual A9 pieces per single A4 master sheet |