Image Format Comparison Guide

What is a Vector Image?

A vector image is a mathematically-based format that maintains perfect clarity at any size. It can be scaled up or down without any loss of quality, making it ideal for signs, logos, and graphics that need to be resized.
Common vector file types include: .AI, .PDF, .EPS

What is a Raster Image?

A raster image is made up of pixels. Unlike vector files, raster images become blurry or pixelated when scaled beyond their original resolution.
These files are resolution-dependent and best used at their native size or smaller.
Common raster file types include: .TIFF, .GIF, .PNG, .JPEG, .PSD
Note: Some .PDF and .EPS files may also contain raster images, depending on how they were created.

Resolution & DPI Guidelines

Image resolution is measured in DPI (dots per inch). This determines how well a raster file prints at full size:

• For large graphics (4' x 4' or larger): 72 to 150 DPI at full size is sufficient

• For smaller or detailed designs and text: 300 DPI at full size is recommended

Important: Using 300 DPI or more on large graphics is usually unnecessary and can result in oversized files that slow production.

Which Should You Use?

Whenever possible, we prefer vector files. They reduce design setup time and produce the highest quality results.
If you must submit a raster image, ensure that:

• It is high resolution at full size

• You avoid compressing or stretching the file

• You follow DPI guidelines based on size and detail

Why It Matters

Low-resolution raster images often require rebuilding, tracing, or correction—this adds cost and time to your project.
Submitting high-quality or vector artwork from the beginning ensures better results, faster turnaround, and lower design fees.

Need Help Choosing the Right Format?
Contact Sandstorm Signs, Inc. for recommendations tailored to your signage needs.
📧 sandstormsigns@gmail.com
🌐 www.sandstormsignsinc.com
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