To make sure your image is large enough to fill the space, you can multiply the size of your image by 300. For example, if you want to cover a 3.5 x 2 business card with an image, your image should be at least 1050 x 600 pixels large.
To make sure your image is large enough to fill the space, you can multiply the size of your image by 300. For example, if you want to cover a 3.5 x 2 business card with an image, your image should be at least 1050 x 600 pixels large.