Reference library

B7 Paper Size

B7 measures 88 x 125 mm, 8.8 x 12.5 cm, or 3.46 x 4.92 in. See pixel dimensions by DPI, aspect ratio, bleed setup, comparisons, and related tools.

Last checked: 2026-05-01

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At a glance

B7 is 88 x 125 mm, 8.8 x 12.5 cm, or 3.46 x 4.92 in. At 300 DPI, B7 is 1039 x 1476 px.

Last checked: 2026-05-01 Source: ISO 216:2007 Found a spec change? Send correction.

How we calculate this

Methodology and source handling

We convert physical sizes to inches, multiply by the selected DPI/PPI value, and round to whole pixels.

Methodology Editorial policy

Quick answer

Copy-ready answer

B7 is 88 x 125 mm, 8.8 x 12.5 cm, or 3.46 x 4.92 in. At 300 DPI, B7 is 1039 x 1476 px.

88 x 125 mm

Dimensions and specs

Millimeters	88 x 125 mm
Centimeters	8.8 x 12.5 cm
Inches	3.46 x 4.92 in
300 DPI pixels	1039 x 1476 px
Aspect ratio	1:1.4205
Standard family	ISO B Series

Pixels

Pixel dimensions by DPI

DPI / PPI	Width	Height	Use
72 DPI	249 px	354 px	Screen or draft reference density
96 DPI	333 px	472 px	Screen or draft reference density
150 DPI	520 px	738 px	Screen or draft reference density
300 DPI	1039 px	1476 px	Common high-quality print setup
600 DPI	2079 px	2953 px	High-resolution archival or print workflow

Formula

How to calculate this size

Pixel formulapixels = millimeters / 25.4 x PPI

88 mm x 300 PPI = 1,039 px wide.

Trim result1,039 x 1,476 px

Use this when the artwork stops at the finished edge.

Bleed result1,110 x 1,547 px

Add 3 mm per side before calculating pixels when artwork reaches the edge.

Common mistakes

Avoid these b7 paper size problems

Mixing screen pixels with print quality

A paper size needs a PPI target before pixels mean anything for print.

Forgetting orientation

Portrait and landscape use the same dimensions, but width and height swap in the export.

Adding bleed to a paper reference

Paper pages show trim size first; add bleed only when the design prints to the edge.

Calculator

Calculate pixels and bleed

Enter any DPI to calculate the pixel dimensions for this physical size.

Compare

Compare B7 Paper Size

Open a curated comparison or send both sizes into the compare tool with a fragment URL.

compare tool B7 vs B6

B7 Paper Size: 88 x 125 mm
B6: 125 x 176 mm

50% smaller than B6 Paper Size. 0.0062 decimal ratio difference compare tool B7 vs B8

B7 Paper Size: 88 x 125 mm
B8: 62 x 88 mm

101.6% larger than B8 Paper Size. 0.0005 decimal ratio difference compare tool B7 vs A4

B7 Paper Size: 88 x 125 mm
A4: 210 x 297 mm

82.4% smaller than A4 Paper Size in Pixels, Millimeters, Centimeters and Inches. 0.0031 decimal ratio difference compare tool B7 vs US Letter

B7 Paper Size: 88 x 125 mm
US Letter: 215.9 x 279.4 mm

81.8% smaller than US Letter Paper Size. 0.0687 decimal ratio difference

B7 belongs to the ISO B Series family. Use this reference for print setup, document layout, template sizing, pixel conversion, and comparisons with nearby paper sizes. Pixel dimensions are calculated from the physical size and selected DPI.

Workflow

Use B7 Paper Size in a finished file

Confirm the physical size

Copy the millimeter, centimeter, or inch dimensions for the selected paper standard.

Choose PPI

Use 300 PPI for most sharp print exports, or match the printer requirement.

Calculate pixels

Multiply inches by PPI, then add bleed only when artwork reaches the trimmed edge.

Related pages and tools

same series B6 paper size same series B8 paper size common alternative A4 paper size common alternative US Letter paper size comparison B7 vs B6 comparison B7 vs B8 tool DPI calculator tool Print bleed calculator tool Compare sizes tool

Same branch

Nearby pages

A4 Paper Size in Pixels, Millimeters, Centimeters and Inches A5 Paper Size Legal Paper Size US Letter Paper Size A0 Paper Size A1 Paper Size A10 Paper Size A2 Paper Size

FAQ

Common questions

What is the exact B7 size?

B7 measures 88 x 125 mm, 8.8 x 12.5 cm, or approximately 3.46 x 4.92 in.

What is B7 in pixels at 300 DPI?

B7 at 300 DPI is 1039 x 1476 px when rounded to the nearest whole pixel.

What aspect ratio is B7?

B7 has an aspect ratio of about 1:1.4205 based on its 88 x 125 mm physical dimensions.

Should I add bleed to a B7 design?

For print work, a common starting point is 3 mm bleed on each side, making the document 94 x 131 mm before trimming. Confirm final bleed with your printer.

References

Sources and references

ISO 216 physical dimensions. Pixel values are calculated from millimeters / 25.4 x DPI and rounded to whole pixels.

ISO 216:2007
Used for ISO A and B series physical paper dimensions.
W3C CSS Values and Units Module
Used for CSS unit definitions, absolute unit relationships, and CSS px behavior.

Last checked: 2026-05-01