Measure jacket sleeve length using the chart's stated starting point. Shoulder-to-cuff and center-back-to-cuff measurements are not interchangeable. Record the endpoint, units and sleeve position alongside the result.
Follow one method consistently
For a garment measurement, lay the sleeve naturally and identify the specified seam or center-back point. Run the tape along the path the supplier requests. Do not pull a curved sleeve straight so hard that the garment changes shape.
For a body measurement, follow the seller's instructions for arm position and endpoints. Have someone help if possible. A bent-arm method can produce a different number from an arms-relaxed method, so avoid mixing them.
Compare with the intended use
Try the jacket in the posture you need for work or everyday activity. Reaching forward can draw the cuff upward. Ribbed cuffs and adjustable openings also influence apparent sleeve length. Record whether the measurement includes the cuff.
Check both arms if you are preparing a tailoring brief. Photograph the measurement and repeat it to confirm consistency. For team orders, the same written method should be used by everyone collecting measurements.
What if the chart gives only a number?
Ask the seller to define it. A sleeve measurement without endpoints is insufficient for a reliable comparison. Use an approved sample when fit matters, and keep the method with that sample so later reorders do not quietly switch to a different convention.
Related reading
Agreeing jacket measurement methods and tolerances. For another useful reference, see Fitting outdoor team jackets across sizes.
