Demon Slayer: Kimetsu no Yaiba is a Japanese manga series written and illustrated by Koyoharu Gotouge.
The story takes place in Taishō-era Japan. It follows Tanjiro Kamado and his sister Nezuko Kamado as they seek a cure for Nezuko's demon curse. Tanjiro and Nezuko become entangled in the affairs of a secret society, known as the Demon Slayer Corps, that has been waging a secret war against demons for centuries. The demons are former humans who sold their humanity in exchange for power, and they feed on humans and possess supernatural abilities such as super strength, magic, and regeneration. Demons can only be killed if they're decapitated with weapons crafted from an alloy known as Sun Steel, injected with poison extracted from wisteria flowers, or exposed to sunlight. The Demon Slayers, on the other hand, are entirely human; however, they employ special breathing techniques, known as "Breathing Styles", which grant them superhuman strength and increased resistance. (Wikipedia direct reference)
As a Demon Slayer, Sanemi Shinazugawa carries around a standard sized and shaped Nichirin katana with a jagged pattern resembling the jaw of a beast in a shade of green. Our version is 66.5cm long and is a black and green painted carbon steel display blade. The hilt which is constructed of a metal alloy is in an abstract shape with 8 points with an overlapping pattern.  Each plate has a forest green core with a silver border. As a Hashira, Sanemi's blade has the words Destroy Demons (惡鬼滅殺 Akki Messatsu) painted on the side.
With his katana, Sanemi has a standard sword sheath that is a shade of deep gray / black with silver marks resembling scars strewn on it. Our verison has a synthetic covered timber scabbard in grey / black and silver /  white scars with a dark green metal koiguchi and kojiri.
Blade Length : 66.5cm approx
Handle Length : 29cm approx
Overall Length : 97.5cm approx