Swords
Japanese swords basically come in three sizes - small, medium and large.
Tanto have a cutting edge of less than 30.3 cm (>12 inches)
Wakizashi have a cutting edge of between 30.3 cm and 60.6 cm (>12 inches to <24 inches)
Katana/Tachi have a cutting edge greater than 60.6 cm (> 24 inches)