How is back length measured in garment construction?

Back length in garment construction is accurately measured from the center of the back of the collar down to the hem. This measurement is crucial for determining the overall fit and style of the garment, as it establishes how the garment will hang on the body. A well-measured back length ensures that the clothing sits properly on the wearer, which affects both comfort and aesthetic appeal. By starting at the collar, this measurement takes into account the design elements that begin there and extends all the way to the hem, thus providing a complete understanding of the garment's dimensions and how it will drape on the wearer's back.