This breed was developed in the Malaysian state of Kelantan and it is thought to be developed by crossing Japanese bantams and some local Malaysian bantams. The birds are tiny and should weigh less than 450 grams, under 350g being preferable. The breed was named after the Thai king Rama, because of its proud carriage. The breed carries itself erect, with an upright tail and protruding breast.

Weight classes for mature adults:
Cocks
A - up to 13 oz (350 gm)
B - up to 16 oz (500 gm)
C - up to 19 oz (600 gm)

Hens
A - up to 11 oz (325 gm)
B - up to 14 oz (425 gm)
C - up to 17 oz (525 gm)