You can look at those for a example of the size requirements.
What I need specifically is a icon that would be good for a map preview. While we got the globe, that doesn't really fit in, and we already are using that for something else. It also should have the same kind of theme/color that warzone uses now.
It would need to be 2 states, a normal state, and then a clicked state. So you can do some kind of animation between them. The animation is like the old school page flip kind, where you have 2 drawings on a piece of paper, and you can 'flip' them, and it looks animated.
I was also screwing around with the idea of avatars.
Would be nice to have at least 8 avatars that can be used to represent 8 players. In the future, it will be custom avatars that people can use.
Not 100% sure on size, but it can't be more than some of the biggest icons you see in infacX.png & frontendX.png in the data\images directory of your .wz file.
Also unsure about color, and if it should follow your players color or not.
Input is welcome.

Then when I got some samples I can play around with, we can see if the devs will incorporate the changes into the game.