Collocations for slender - adj.

be, look

extremely, fairly, very, etc.
Those jeans make you look very slender.

long slender …
She had long slender fingers.

be, seem
remain

fairly, pretty, rather

Slender is used with these nouns:
ankle, arm, back, body, build, chance, figure, finger, frame, hand, hip, leg, limb, majority, means, neck, physique, stem, thigh, volume, waist, wrist