MinHeight

Below this the mark stops being legible at the size NAVER requires.

N 로고 크기는 아이콘형 18px, 완성형 16px 이상을 사용하고 — 18 px in the icon-only form, 16 px in the full one. markSize lands on exactly 18 dp here, so this is the floor for the stricter of the two forms and the full form clears it with room to spare. It is also the smallest comfortable touch target on both platforms, which is a happy coincidence rather than the reason.