How to Prepare Images for Print: Business Cards, Flyers, and Posters

Preparing images for print is different from preparing them for screen. A photo that looks great on your monitor may print blurry, too small, or with color shifts if it isn't set up correctly. This guide covers the exact requirements for the most common print formats.

The core concept: DPI and physical size

For screens, image quality is determined by pixel dimensions alone. For print, what matters is how many pixels are packed into each physical inch — expressed as DPI (dots per inch).

The formula is simple:

Required pixels = print size in inches × DPI

At 300 DPI (the standard for sharp print):

• •A 4×6 inch photo requires 1200×1800 pixels
• •An A4 page requires approximately 2480×3508 pixels
• •A 24×36 inch poster at 150 DPI requires 3600×5400 pixels

If your image doesn't have enough pixels, the print shop upsamples it — stretching each pixel to cover more area — and the result looks blurry or pixelated. Always calculate whether your image has enough pixels before sending to print.

Business cards

Standard business card dimensions vary slightly by country:

• •US: 3.5 × 2 inches (89 × 51 mm)
• •EU: 85 × 55 mm
• •Australian: 90 × 55 mm

At 300 DPI with 3mm bleed (extra margin that gets cut off, ensuring color or images extend to the edge with no white border):

• •US business card with bleed: approximately 1071 × 657 pixels (3.57 × 2.19 inches at 300 DPI)

Key considerations for business card images:

Bleed: If your design uses a background color or image that should extend to the card edge, add 3mm (about 34 pixels at 300 DPI) of extra background on all sides. Print shops cut along the cut line, and bleed ensures no white border appears if the cut is slightly off.

Safe zone: Keep important content (text, logos) at least 3mm inside the cut line, so it isn't accidentally trimmed.

Resolution: Any photos on a business card must be at least 300 DPI at the printed size. A small photo (500px wide) printed at just 1.5 inches wide at 300 DPI will print fine; the same 500px image stretched to 3 inches wide will look blurry.

File format for delivery: Send as a PDF with embedded images and fonts if using a print service. PNG or high-quality JPG (95+) if the template provides for it.

A4 flyers

A4 dimensions: 210 × 297 mm (8.27 × 11.69 inches)

At 300 DPI with 3mm bleed: 2551 × 3579 pixels

Workflow for A4 flyer images:

1. 1Set up your design canvas at 2551 × 3579 pixels (or 215 × 302 mm at 300 DPI including bleed).
2. 2Place background images at full canvas size — at least 2551 pixels wide for a full-bleed background.
3. 3Keep text and logos within the safe area: 3mm inside the trim line on all sides.
4. 4Compress and export as PDF for professional printing, or high-quality JPG/PNG for home printing.

For background photos on A4 flyers, you need images that are at least 2500px wide and ideally 3000px+ for any zoom or crop flexibility. A typical 12-megapixel smartphone photo (4032×3024) has more than enough resolution for an A4 flyer.

Poster sizes

Posters require lower DPI than small print items because they're viewed from a distance. The standard is:

• •A3 (420×297mm) desktop poster: 300 DPI — approximately 4961×3508 pixels
• •A2 (594×420mm) wall poster: 150–200 DPI — 3508×2480 pixels at 150 DPI
• •A1 (841×594mm) large format: 100–150 DPI — 4961×3508 pixels at 150 DPI
• •24×36 inch trade show banner: 100–150 DPI — 3600×5400 pixels at 150 DPI

The larger the format and the further from the viewer, the lower the DPI you can use without visible quality loss. A billboard is often printed at just 10–15 DPI because it's viewed from 30 meters away — at that distance, individual dots are invisible.

For large format printing: If your images are lower resolution than ideal, use BG Bueno's Image Enhancer to upscale them before submitting. AI upscaling can recover some detail and produce better print results than simple bilinear upsampling by the print driver.

Photo prints

For prints you'll hang on a wall or give as gifts, use 300 DPI source images. For snapshots and casual reference prints, 150 DPI is adequate.

Color profile for print

Always send images in the correct color profile:

• •For consumer/home printing: sRGB. All consumer printers use sRGB as their input color profile.
• •For professional print labs: Check with the lab. Most accept sRGB; high-end labs may accept Adobe RGB and can produce a wider color gamut.
• •For commercial CMYK printing (brochures, catalogs, magazines): Images should be converted to CMYK with the correct ICC profile for the press. Your print vendor can specify which profile.

If you send an Adobe RGB file to a consumer printer without conversion, colors will appear slightly duller than expected. Always convert to sRGB unless you're specifically working in a color-managed professional print workflow.

Checklist before sending to print

• •[ ] Image pixel dimensions meet the DPI requirement at the print size
• •[ ] Color profile is sRGB (or CMYK if specified by the print vendor)
• •[ ] Bleed included where design goes to the edge
• •[ ] Important content inside the safe zone (3mm from trim line)
• •[ ] File format meets print vendor requirements (PDF preferred for most services)
• •[ ] Font resolution/size is adequate (fonts over 8pt print cleanly at 300 DPI)
• •[ ] Proof reviewed on a calibrated monitor or requested from the print vendor