Hi CKB!
The clan feature on the website is currently going through some changes, and we're not yet ready to start adding clans on it. However, in the near future, we'll hope to have the system fully operational. When we do, we'll look forward to receiving the clan information, along with a clan logo. Additionally we'll host a brief description of the clan and a link to its confirmed website. We'll let you know once everything is ready.
Meanwhile, those who already want to get busy with the logo crafting, the *likely* dimensions will be:
Thumbnail: 64x64 pixels.
Full logo: 300x300 pixels, less than 300kb.
The images don't need to be the of the same logo, but they might make more sense that way.
