# 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