Sumo ring measures?

[Takemi 0]

Does anyone knows the exact measures of a sumo ring?

I

[Kintamayama 47,183]

Try this link-it's the best I know..

http://www.scgroup.com/sumo/faq/faq5.html#1.1

[Yoavoshimaru 0]

There's also the information from our very own glossary (link above):

dohyo, when referring to actual tournament dohyo; about 30 tons of weight, 540*540 cm of dimensions and 60 cm of height, made by the yobidashi out of special clay that has some sand in it, a sacred arena under tsuriyane bordered by half-embedded hyo on which the torikumi are fought; sometimes mistaken for the brink of the dohyo circle, the tawara; see Arakawa, Arakida, toku-dawara, kengamine, fumi-dawara, joubu-dawara, kado-dawara, soto-dawara, janome, dohyo matsuri, nijuudohyo