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

B1 vs. B2

Comparing 2 standards across 7 specifications. 7 key differences identified.

Comparing:
B1 B1
B2 B2

B1 is an ISO 216 standard paper size measuring 707 × 1000 mm (27.83 × 39.37 inches) with a surface area of ~0.707 square meters. Defined with an exact 1-meter long edge, it is the worldwide standard format for theatrical movie posters, museum exhibition graphics, and commercial lithographic press sheets.

View full B1 spec sheet →

B2 is an ISO 216 standard paper size measuring 500 × 707 mm (19.69 × 27.83 inches) with a surface area of ~0.354 square meters. Operating with an exact 500 mm (0.5 meter) short edge, it is the benchmark format for commercial half-size offset printing presses, concert tour posters, and art museum prints.

View full B2 spec sheet →

Specification Comparison Table

7 Parameters
Parameter / Spec
B1 B1
B2 B2
Width × Height (Metric)
707 × 1000 mm 500 × 707 mm
Width × Height (Imperial)
27.83 × 39.37 in 19.69 × 27.83 in
Nominal Surface Area
0.707 m² (707,100 mm²) 0.354 m² (353,550 mm²)
Geometric Mean Origin
Geometric mean of A0 (841×1189 mm) and A1 (594×841 mm) Geometric mean of A1 (594×841 mm) and A2 (420×594 mm)
Defining Dimension
Long edge is exactly 1.000 meter (1000 mm) Short edge is exactly 500 mm (0.5 meter)
Weight of 80 gsm Sheet
56.6 grams 28.3 grams
Primary Applications
Theatrical movie one-sheet posters (international), bus shelter ad kiosks, lithographic print testing Concert posters, retail promotional signs, commercial packaging mockups