Ecto-Meso Body Type
Second most common, 1 in 5 people are a mix of ectomorph and mesomorph. You aren’t as skinny as a pure ectomorph, but you do stay lean.
While you can gain muscle with some effort, you also lose it easily. So getting big and muscular is challenging for you.
However, this is a good body type to have for a lean aesthetic look (think Frank Zane). As long as you prioritize muscle gain.