Side-by-Side Comparison
A-Series (ISO 216)
A5 vs. A6
Comparing 2 standards across 8 specifications. 7 key differences identified.
Comparing:
A5
A6
A5 is an ISO 216 standard paper size measuring 148 × 210 mm (5.83 × 8.27 inches), created by cutting or folding an A4 sheet in half. It is the dominant global format for commercial spiral notebooks, daily planners, paperback novels, corporate marketing flyers, and restaurant menus.
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.
Specification Comparison Table
8 Parameters| Parameter / Spec | ||
|---|---|---|
|
Width × Height (Metric)
|
148 × 210 mm | 105 × 148 mm |
|
Width × Height (Imperial)
|
5.83 × 8.27 in | 4.13 × 5.83 in |
|
Nominal Surface Area
|
0.03125 m² (1/32 m² — 31,250 mm²) | 0.015625 m² (1/64 m² — 15,625 mm²) |
|
Exact Aspect Ratio
|
1 : √2 (1 : 1.4142) | 1 : √2 (1 : 1.4142) |
|
Weight of Standard 80 gsm Sheet
|
2.5 grams | 1.25 grams |
|
Primary Applications
|
Stationery notebooks (Moleskine, Rhodia), marketing flyers, paperback booklets, event programs | International postcards, pocket notebooks (Field Notes style), thermal photo prints, lab sample tags |
|
Halving Relationship
|
Cut in half yields 2 sheets of A6 | — |
|
Matching Postal Envelope
|
— | C6 Envelope (114 × 162 mm) |