Brands can keep bomber jacket fit consistent when changing suppliers by controlling both the garment body and the structural details. A bomber jacket may match the size chart but still feel different if the shoulder slope, sleeve cap, armhole, lining ease, rib tension, zipper length, or hem shape changes. Brands should send an approved physical sample, tech pack, measurement chart, fabric standard, rib reference, zipper sample, lining details, and previous fit comments. The new bomber jacket manufacturer should verify the pattern, make a fit sample, confirm the PP sample, and check TOP samples before bulk production continues. Side-by-side comparison with the previous approved bulk sample is also important for mature brands that need stable reorders.