What are Brom Bones' physical characteristics in "The Legend of Sleepy Hollow"?

Brom Bones from The Legend of Sleepy Hollow is strong, big, and brave.

Brom Bones is really Abraham Van Brun.  Brom is the Dutch abbreviation for Abraham.  He is described as a “burly, roaring, roystering blade” and a hero to the whole country, which likes to sing songs and tell tales of “his feats of strength and hardihood.”  He is very strong and brave and roughly chivalrous.

 He was broad-shouldered and double-jointed, with short curly black hair, and a bluff, but not unpleasant countenance, having a mingled air of fun and arrogance. 

 He earned the nickname Brom Bones from his extraordinary physique.  It is a compliment to his strength.  Soon, he is universally known by it.  He is always ready to fight or play, and has a gang of loyal followers. 

He also acts as umpire in everything from fist fights to cock fights, and settles any dispute while walking around “setting his hat on one side” and giving his decisions in a way that allows no arguing.  In cold weather he wears a fox-tail fur hat.

How did Brom Bones evolve in Washington Irving's "The Legend Of Sleepy Hollow"?

While the focus of "The Legend of Sleepy Hollow" is not usually directed solely at Brom Bones, this brawny young man does experience at least some character development during the course of the short story. For example, when we're first introduced to him, Brom Bones seems to be all brawn and very little brain: he's apparently more fond of racing around on his horse and causing a ruckus than he is in participating in sophisticated society. However, at the end of the short story, it's suggested that Brom Bones disguised himself as the headless horseman to run Ichabod Crane out of Sleepy Hollow. This act (while undoubtedly cruel) displays a surprising amount of premeditated cleverness on Brom's part, and so he shows that he's developed more critical thinking skills by the end of the narrative. Now, it appears that he's also still thuggish and coarse by the end of the tale, so, while he may have developed in some areas, he also largely stays the same in many ways.