A sugar melon is a type of cantaloupe that is about 5–6in (13–15cm) in diameter and weighing between 2.5 and 4lb (1.1 and 1.8kg). Nearly round in shape, it has thick, sweet, orange flesh and a silvery gray, ribbed exterior.
References
Ward, Artimas. The Grocer's Encyclopedia. New York: 1911. digital.lib.msu.edu