What should a tech pack include before asking for a jacket quote?

A workable minimum tech pack contains seven things: technical flats (front/back/detail), a measurement spec sheet with tolerances, a bill of materials (fabric and trims), colourways with codes, artwork and logo placement, construction notes, and packaging requirements.

Why it matters commercially: the price of a jacket is driven by fabric weight and composition, trim count, and construction complexity — seam taping, laser cutting, embroidery stitch counts. A factory that receives a complete tech pack can quote a firm number and hold it; one that receives only a photo can only give a range that will move once the real spec appears. If you do not have a tech pack yet, ask the factory whether they can build one from a reference sample and a measurement chart — most can, for a defined development fee.