I usually throw with my left hand, though I can use either.
"I take up the rope from the saddle bow, so." He lifted his riata in his right hand.

His little finger held the standing end of the rope, the third and middle finders supported the coil, and the noose dangled from his first finger, while his thumb steadied the whole rope and held it from slipping.

The coils were not more than a foot or a foot and a half in diameter.

The noose was the same size.
"That's a smaller noose than you would use on the range, is it not ?" "No," answered Mr.Ohnimus, "the vaquero never carries his noose long.
If he did, it would be constantly getting tangled up in the horse's legs.

He makes it larger when he swings it.