Find a word for 'of great stature'

I am a word with 3 to 7 letters.I am plural. If you add 's' at my end ,I will be singular.I mean 'of great stature' can you find me?

All genius, try this and find it out.

-------------------------------------------------------------
<a href="https://www.burco-molding.com/" target="_blank" rel="nofollow noopener noreferrer">Burco-Molding - Home</a>