Resolution is the degree of detail visible in a raster or vector image.
Raster images (like photos) are comprised of pixels — or, dots of colour.
- High resolution means there are many dots per inch.
- Low resolution means fewer dots per inch, and poorer quality.
- For VistaPrint products, aim for at least 300 dpi at the desired image size unless the product indicates otherwise.
Vector images are not comprised of pixels; they're calculated and displayed with the help of mathematical equations.
- They can be stretched to any size while maintaining high quality.
- It's preferable to use vector images whenever possible.