This is my first post on this forum, so I’m not sure if I’m posting this in the best category, but here goes…
I want to create a collection of images focusing on U.S. state flags that can be used by students, teachers or anyone interested in flags. It will include images of all the official state flags (all public domain), along with images of some state flag proposals (some public domain, others Creative Commons). There may even be some customized pictures that can only be used in print or on merchandise for a fee.
Some of the designs will also be broken down into elements. In other words, there may be a blue rectangle, a separate white stripe that can be modified or deleted, etc.
What’s the minimum size that you would recommend? I’ve been working on such a collection in association with an ePub, and all my images are 1,000 pixels wide. However, people who want to use such images in posters, videos, Power Point presentations or whatever will probably want a bigger size.
My guess: I should probably make every image 2,000 pixels wide, resolution 300 in Photoshop format, with a second copy of each image in a .png format. For more complex images, I might replace the .png with a .jpg format.
I’m planning on selling the folder of images for $10 or maybe even $25, so I want it to be professional.
What format and dimensions would you recommend?