Measure jacket length from the exact reference point requested by the supplier. Back neck seam, high shoulder point and collar top can produce different results. The number should always be accompanied by its method.
Set up the garment
Lay the jacket naturally on a flat surface and smooth it without stretching. Close it if the supplier's method requires that. Identify the start point clearly and measure to the designated hem edge. Include or exclude collars and ribbing only as instructed.
For an uneven hem, record which portion is being measured. A longer back and shorter front cannot be summarized accurately by one unspecified number. Photograph the tape path so the result can be reproduced.
Use length to compare proportion
Compare the number with a jacket that fits the intended use. A cropped casual jacket and an outdoor shell need different coverage. Sit and raise your arms when trying a sample; flat length does not reveal how the hem moves on the body.
If you are ordering multiple sizes, check whether the grading changes length as well as width. A larger size may add unwanted body length while solving chest room. Another cut may fit better.
Can body height determine jacket length?
Height is a useful starting point but does not capture torso proportion, posture or style. Use actual garment measurements and fitting observations. For a production brief, specify the measurement location and tolerance rather than writing only short, regular or long.
Related reading
Agreeing jacket measurement methods and tolerances. For another useful reference, see How to document jacket sample approval.
