Design size reference
PixelMeasures
Find exact paper sizes, pixel dimensions, DPI conversions, print bleed setup and image resizing tools before you build the file.
Popular resources
Start with the size people search for most
Open a reference page for exact measurements, or jump straight into a calculator when you already know the target format.
A4 paper size
Dimensions in mm, cm, inches and pixels by DPI with print setup notes.
210 x 297 mm Paper sizeUS Letter size
North American document dimensions in inches, millimeters and pixels.
8.5 x 11 in Print sizeBusiness card size
Common print dimensions with bleed-aware setup links.
Print setup CalculatorDPI calculator
Calculate pixel density, output size and resolution from one place.
DPI / PPI CalculatorAspect ratio calculator
Resize layouts while keeping proportions clean across formats.
Ratio ToolImage resizer
Resize images locally in the browser using custom dimensions or presets.
Browser tool CalculatorPrint bleed calculator
Add bleed, trim and safe-area dimensions before sending files to print.
Trim + bleed PublishingKDP cover calculator
Calculate paperback and hardcover cover width, spine, bleed and pixels.
KDP covers GuideSocial media image sizes
Find platform image dimensions for profiles, covers, posts and stories.
Creator guideConversion tools
Turn measurements into usable export specs
Convert millimeters, centimeters, inches and pixels. Compare formats, calculate bleed and resize image files locally in the browser.
Topic hubs
Choose the library that matches the work
Each hub leads to focused pages with dimensions, copyable values and relevant tools.
Paper and print sizes
ISO, office, photo and print formats with physical dimensions, pixel tables and bleed notes.
All paper sizes Print sizes Photo sizesPlatform sizes
Social, streaming and marketplace image dimensions for posts, covers, thumbnails and profiles.
All platform sizes Facebook cover photo YouTube thumbnailCalculators and resizing
Browser tools for DPI, aspect ratios, image resizing and side-by-side size comparison.
All tools Aspect ratio calculator Image resizerGuides and templates
Plain-English guidance for DPI, PPI, bleed, safe areas and canvas setup decisions.
All guides DPI vs PPI A4 bleed templateCreator workflow
From blank canvas to production-ready dimensions
Choose a format
Start with a paper size, document format, platform asset or custom measurement.
Calculate pixels
Convert physical dimensions into pixel dimensions using the DPI or PPI you need.
Add print setup
Apply bleed, trim and safe-area values before sending artwork to a printer.
Copy and export
Move exact values into Photoshop, Illustrator, Canva, Figma, InDesign or PDF settings.
FAQ
Common questions before choosing a size or calculator
What is PixelMeasures used for?
PixelMeasures helps creators find copy-ready dimensions, pixel sizes, DPI conversions, aspect ratios, print bleed values and export setup guidance for print and digital design work.
How do I find the pixel size of a paper format?
Choose the physical size and multiply the inch dimensions by the DPI or PPI. For example, A4 is 8.27 x 11.69 inches, so at 300 DPI it is approximately 2480 x 3508 pixels.
Which DPI should I use for printing?
For many high-quality print projects, 300 DPI is a practical starting point. Drafts, large-format viewing and specialist print processes may use different settings, so confirm requirements with the printer.
Does PixelMeasures include print bleed guidance?
Yes. The paper size guides include print setup notes, and the print bleed calculator helps convert trim dimensions into bleed-ready canvas sizes.
References
Sources and references
These references support the core paper dimensions, DPI/PPI concepts, print setup guidance, and browser sizing behavior used across PixelMeasures.
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ISO 216:2007
Used for ISO paper-size dimensions such as A4.
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HP paper size reference
Used as a reputable printer reference for North American paper sizes such as US Letter.
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Adobe Photoshop image size and resolution
Used for pixel dimensions, DPI/PPI, and image-resolution concepts.
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Adobe InDesign print bleed guidance
Used for print bleed and crop-mark setup guidance.
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MDN Web Docs: CSS length units
Used for CSS unit and browser sizing behavior referenced by the tools.
Last verified 2026-05-01
Ready to measure
Find the right size before you design
Browse the reference library, calculate pixels from DPI or copy a print-ready setup for your next document, flyer, poster, worksheet or PDF.