Describing build and physique of a person

Slim

(A person thin especially in an attractive way, a man of delicate build, not stout or chubby )

Example: 

Jerry has a small build.

I was slimmer in my teen age.

She looks slim and fit for her age

Slight:

(Thin and not very strong or muscular, alternative word for slim but used not in an attractive way)

Example:

Her dressing was fantastic because of her slight posture.

Thin:

(A person who is too weak and lacking flesh on his body, used in a negative way)

Examples:

This large overcoat will look disgusting on his thin body.

A thin child died due to scuffing while cleaning the chimney.

Lean: 

(Physically thin, healthy and strong man; not having much fat on the body)

Example:

She has a lean body.

Athletes are mostly lean.

Willowy:

(A man with tall, thin and graceful personality)

Example:

Amir Khan was a willowy actor in his teen age.

Skinny:

(Word used for very thin person; a person lacking flesh on his body)

Example:

You look too skinny; focus on your health.

He is skinny due to weak liver.

Slender:

(A person thin especially in an attractive way)

Examples:

Emilee has a slender figure.

Everyone loves slender personality.

Bony:

(A person who is lean in such a way that bones are noticeable or visible like chest ribs or shoulder collars)

Examples:

He is looking bony due to long-term sickness.

A bony child could not survive due to weakness.

Chunky:

(A person having thick and strong body with somewhat fat on his body)

Example:

Rocky, an athlete with a chunky build, was the winner of the match.

Her chunky hips were looking very bad.

Chubby:

(This word is alternative of chunky and used for a fat man)

Examples:

He is still chubby as he was in his childhood.

Flimsy

(A person lacking physical strength)

Examples:

Doctors advised egg and milk in breakfast to a flimsy patient.

She is looking flimsy due to illness.

Portly:

(A person with round and somewhat fat body; stout)

Examples:

A portly man was looking like a rolling football when he was running fast.

Plump:

(A man having a full rounded shape with slightly fate usually in a pleasing form and this word is used as alternative of ample)

Examples:

He has been plump all his life while his brother has always been willowy.

Round:

Stout:

(Thick and strong body, a body that is wide with fat or muscles)

Examples:

He could not qualify for sprint race due to his stout physique.

Pudgy:

(A person with short height and plump [chubby] body)

Examples:

He lost his first position in high jump competition due to his pudgy posture.

Full-figured:

(A person with fully developed figures and body)

Examples:

She looks full-figured although she is too young.

Ample:

(This word is used to describe a person’s (especially a female) body as being large in an attractive way.

Examples:

Her ample physique adds beauty in her personality.

Broad-shouldered:

(A man with wide and strong shoulders with well-developed muscles)

Examples;

A broad-shouldered man was trying to lift a heavy stone.

His broad-shouldered physique makes him a good looking athlete.

Burly:

(A strong and heavy man)

Examples:

A burly former pulled the plough in the fields.

A burly man cannot run fast for a long.

Muscular:

(A man with strong and large, well-developed, muscles)

Examples:

Jam has a muscular physique.

Her legs are muscular due to daily exercise for one hour.