I've been trying to make speedrun.com logos for the Jstris leaderboards and i just need the resolution so i can work on it.

For the speedrun.com logo, the max height is 32px and max width is 180px. If the image is smaller then it will stay that way.

For trophy icons, the height is always 16px, and the width is changed dynamically to preserve the aspect-ratio of the original image.

Correct me if I'm wrong, but aren't the logo dimensions 720px by 128px now?

720px is almost the entire screen

It's scaled down when displayed, but that doesn't mean the base images have to be so small to begin with.

From Pac, three months ago: "Logos uploaded are resized to a maximum of 720×128. We don't store any original files higher resolution than that.

Before 2017-11-05 however, they were resized to a maximum of 180×32, so any logos uploaded before that are still low quality."

https://www.speedrun.com/the_site/thread/p3vn1

Ah well, I talked about the displayed dimensions, but good to know.