How long should a sash be?
Depending on the size of the dress, the sash should be between 60 and 180 inches (152.4-457.2 cm) long.
What is Sash?
A sash is a large and usually colorful ribbon or band of material worn around the body, draping from one shoulder to the opposing hip, or else running around the waist. The sash around the waist may be worn in daily attire, but the sash from shoulder to hip is worn on ceremonial occasions only.