slightly slim or not very slim

थोड़ा पतला

English Usage: He had a slimmish build that looked fit.

Hindi Usage: उसका थोड़ा पतला शरीर दिखने में फिट था।

a quality or condition of being slim or slender

पतलापन

English Usage: Her dress accentuated her slimmish figure.

Hindi Usage: उसकी ड्रेस ने उसके पतलेपन को और उभार दिया।