Side-by-Side Comparison
A-Series (ISO 216)
A6 vs. A9
Comparing 2 standards across 8 specifications. 7 key differences identified.
Comparing:
A6
A9
A6 is an ISO 216 standard paper size measuring 105 × 148 mm (4.13 × 5.83 inches), with a surface area of 1/64 square meter. Created by folding an A4 sheet into quarters, it is the worldwide postal standard for international picture postcards, pocket diaries, and point-of-sale receipt slips.
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)
|
105 × 148 mm | 37 × 52 mm |
|
Width × Height (Imperial)
|
4.13 × 5.83 in | 1.46 × 2.05 in |
|
Nominal Surface Area
|
0.015625 m² (1/64 m² — 15,625 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
|
1.25 grams | 0.156 grams |
|
Primary Applications
|
International postcards, pocket notebooks (Field Notes style), thermal photo prints, lab sample tags | Postage stamps, small jar adhesive labels, index divider tabs, coupon tokens |
|
Matching Postal Envelope
|
C6 Envelope (114 × 162 mm) | — |
|
A4 Imposition Yield
|
— | 32 individual A9 pieces per single A4 master sheet |