# item.guide
Side-by-Side Comparison A-Series (ISO 216)

A0 vs. A10

Comparing 2 standards across 9 specifications. 9 key differences identified.

Comparing:
A0 A0
A10 A10

A0 is the base unit of the ISO 216 international paper standard, defined with an exact surface area of 1 square meter (1.000 m²) and dimensions of 841 × 1189 mm (33.1 × 46.8 inches). Operating on the 1:√2 Lichtenberg aspect ratio, it is the global standard for large architectural CAD plots, engineering schematics, and academic conference poster presentations.

View full A0 spec sheet →

A10 is the smallest standardized paper size defined under ISO 216, measuring 26 × 37 mm (1.02 × 1.46 inches) with a surface area of 1/1024 square meter. It is standard for admission raffle ticket stubs, micro coupons, small security inspection stamps, and dental sample labels.

View full A10 spec sheet →

Specification Comparison Table

9 Parameters
Parameter / Spec
A0 A0
A10 A10
Width × Height (Metric)
841 × 1189 mm 26 × 37 mm
Width × Height (Imperial)
33.1 × 46.8 in 1.02 × 1.46 in
Nominal Surface Area
1.000 m² (1,000,000 mm²) 0.0009765625 m² (1/1024 m² — 962 mm²)
Exact Aspect Ratio
1 : √2 (1 : 1.4142 — Lichtenberg ratio) 1 : √2 (1 : 1.4142)
Weight of Standard 80 gsm Sheet
80.0 grams exactly 0.078 grams
Halving Relationship
Cut in half across length yields 2 sheets of A1
Primary Applications
Architectural blueprints, GIS cartography, technical CAD schematics, academic research posters
A4 Imposition Yield
64 individual A10 pieces per single A4 master sheet
Status in ISO 216
The absolute smallest formal size defined in the standard