The Lost Mine of Phandelver
A goblin stands 3 to 3.5 feet tall and weighs 40 to 45 pounds. Its eyes are usually dull and glazed, varying in color from red to yellow, and its skin color ranges from yellow through any shade of orange to a deep red; usually all members of a single tribe are about the same color. Goblins wear clothing of dark leather, favoring drab, soiled-looking colors.
Being bullied by bigger, stronger creatures has taught goblins to exploit what few advantages they have: sheer numbers and malicious ingenuity. The concept of a fair fight is meaningless in their society. They favor ambushes, overwhelming odds, dirty tricks, and any other edge they can devise.