For a dress with sleeves, measure from the top of the shoulder seam down to the hem of the dress. [4] X Expert Source Andrea BeaulieuProfessional Tailor & Fashion Designer Expert Interview. 1 May 2020. Most dresses are at least 30 inches (76 cm) in length and can be as long as 62 inches (160 cm) in length.
You may need a friend to help you hold the measuring tape in place.
If you are very tall or very short, the dress may hit you differently in the knee area depending on your height.