The following information originates from the Chronicles of Narniamovies, as opposed to C. S. Lewis' chronicles.
Ogre and Onis
between 6' to 8 feet
Ogres: giant-like appearance, massive size, low intelligence. Onis: Demon like appearance with purple lips with sharp teeth, and either one or two horns on it's head.
An ogre is a large creature native to Narnia. In many ways, they are similar to Trolls and Cyclopes, as they share their low intelligence and massive size. Yet they appear to be bigger and more smarter than them.
They were followers of the White Witch, and attended the sacrifice of Aslan. One served as Jadis' jailer at her castle.