Look up ISO 216 standard B series paper sizes. Get exact millimeter and inch dimensions for B0 to B10, plus a visual comparison chart.
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When designing or printing, do you ever need a standard size slightly larger or more specific than the A series? The B series paper size chart directly solves this problem. It accurately lists the millimeter and inch dimensions for 11 standard sizes from B0 to B10, accompanied by an intuitive size comparison chart. The B series is one of the paper size systems defined by the ISO 216 international standard. The area of its base size, B0, is defined as √2 square meters. The area of each subsequent B(n) size is half that of B(n-1), consistently maintaining an aspect ratio of 1:√2.
Q: What is the size of B4 paper in centimeters?
The standard size of B4 paper is 250 mm × 353 mm, which converts to 25.0 cm × 35.3 cm.
Q: What is the main difference between B series and A series paper?
Both the B series and A series follow the ISO 216 standard and share an aspect ratio of 1:√2, but their base areas differ. The area of B0 is √2 square meters (approx. 1.414 ㎡), while the area of A0 is 1 square meter. Therefore, a B series paper with the same number (like B4) is always larger than its A series counterpart (A4). The B series is primarily used to fill the gaps between A series sizes and is commonly used for posters, books, envelopes, and other specialized printed materials.
This is a static reference tool with data based on the ISO 216 standard. Please rely on the exact values in the table; the diagrams are for relative size reference only. When browsing on mobile devices, if the table is too wide, please swipe left or right to view the complete data. All dimensions are presented in a "width × height" format, where "width" is the shorter edge and "height" is the longer edge.
For graphic designers and printing professionals, understanding the relationship between the B series and the A and C series is crucial. B series sizes often serve as non-standard supplements to the A series. For example, a B1 sheet can be perfectly cut into two A1 sheets while leaving room for bleed or crop margins. A typical application: if you are designing a poster that requires a special size, and A1 (594 × 841 mm) is slightly too small while A0 (841 × 1189 mm) is too large, B1 (707 × 1000 mm) is an excellent choice. Remember that the B series aspect ratio (1:1.414) is highly useful when scaling design drafts; cutting it in half keeps the proportions unchanged, maintaining the harmony of your design elements.
