Complex sentence: Dymchurch Redoubt is circular in form and built of brick with granite and sandstone dressings, measuring up to 68 metres in diameter and stands 12 metres above the floor of its 9 metre-wide dry moat.
Split into simpler sentences: Dymchurch Redoubt is circular in form and built of brick with granite and sandstone dressings. It measures up to 68 metres in diameter and stands 12 metres above the floor of its 9 metre-wide dry moat.