It's a ratio thing. I measure how I draw the head based on the eyes, and how I draw the body with heads as a measurement. You can do something like that too! If it helps to make the canvas too big so you can measure a ratio, then that's a great idea to keep it consistent. For your heads, since the eyes are so big, you may want to do measurements instead.
![[Art] Vio 2024](https://storage.googleapis.com/paperdemon-prod-la/submissions/thumbs/art_82944_thumb_52cdd04939d5dab4540d979ee2a1d30465f9223292470.png)
Maybe next time I'll try to use guidelines
Aaandd ofc give more space between the eyes if it's more fitting that way