No weight divisions are used in professional sumo; a wrestler can sometimes face an opponent twice his own weight. However, with superior technique, smaller wrestlers can control and defeat much larger opponents.

Is there a weight requirement for sumo?

Sumo has minimum height and weight restrictions, as well as age limits for those who want to become a rikishi. To gain acceptance to the sport you must be at least 167 cm tall and weigh 67 kg. If you are just shy of those marks, don't worry.

Can sumo wrestlers be skinny?

Since there are no weight divisions in professional sumo, every wrestler basically just wants to get as big as humanly possible so that he can use his weight in the ring. ... A famous exception to the general fatness is Takanoyama Shuntaro, known as the “Skinny Sumo”: a Czech wrestler distinctive for his diminutive size.