Ego height

Your "Ego height" is the height you tell people but isn't your real height.
For men, it's typically taller than their actual height (they add around 1-2 inches); for women, it's normally shorter than their actual height (they subtract around 1-2 inches).

Arin is 5'10" and she tells people that she is 5'8".

Therefore her "ego height" is: 5'8"