Arreton Down is a 29.77 hectare

Hectare

The hectare is a metric unit of area defined as 10,000 square metres , and primarily used in the measurement of land. In 1795, when the metric system was introduced, the are was defined as being 100 square metres and the hectare was thus 100 ares or 1/100 km2...

 biological Site of Special Scientific Interest on the Isle of Wight

Isle of Wight

The Isle of Wight is a county and the largest island of England, located in the English Channel, on average about 2–4 miles off the south coast of the county of Hampshire, separated from the mainland by a strait called the Solent...

, originally notified in 1979 for its geological interest and then renotified in 1987, but for its biological interest only.
It is public access land and popular with early morning dog walkers, who park near the chalk pit entrance. The land is marked by extensive ancient field features as yet unexcavated.