GOBLIN
A goblin stands 3 to 3-1/2 feet tall and weigh 40 to 45 pounds. Its eyes are usually dull and glazed, varying in color from red to yellow. A goblin?s 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, tending toward drab, soiled-looking colors.
TROLL
Trolls walk upright but hunched forward with sagging shoulders. Their gait is uneven, and when they run, their arms dangle and drag along the ground. For all this seeming awkwardness, trolls are very agile.
A typical adult troll stands 9 feet tall and weighs 500 pounds. Females are slightly larger than males. A troll?s rubbery hide is moss green, mottled green and gray, or putrid gray. The hair is usually greenish black or iron gray.
These descriptions were meanly stolen from Monster Manual, but they provide the best view of these creatures