Passage: The castle was in decline by the end of the reign of Elizabeth I. Although the stonework was sound, minimal maintenance had led to significant deterioration of other parts of the structure. The manor was purchased in 1604 by Henry Hastings, 5th Earl of Huntingdon, who had his own castle in nearby Ashby-de-la-Zouch. The Melbourne property was then demolished and used as a source for building materials. All that remains of Melbourne Castle today is a section of wall about 15 m (50 ft) long and 4 m (13 ft) high and some foundations; nothing is known of the internal layout of the former building. The ruins are grade II listed and the site is a scheduled monument. There is no public access to the castle remains.

Question: What are the measurements of the Melbourne Castle?
15 m (50 ft) long and 4 m (13 ft) high