A tech pack is the difference between a sample that matches your idea and three rounds of guessing. It does not need to be beautiful. It needs to answer every question a pattern maker and a sample room will ask before they cut fabric.
Start with the garment, not the drawing
Front, back and side flat sketches at proportional scale. Mark every seam, topstitch, panel split and pocket placement. If a detail only exists in a photo of a reference garment, write down what it is: “double-needle 6 mm hem”, “self-fabric facing”, “raw edge at sleeve”. Photos show intent; words make it repeatable.
Specify fabric before styling
Give composition and weight, or send a swatch. “Cotton fleece” is not a specification — brushed or loopback, pre-shrunk or tubular, and the hand-feel you expect all change the pattern. If you are still choosing, say which two options you are deciding between so the sample room can quote both.
Put measurements in a table
One row per point of measure, one column per size, tolerances included. Chest, body length, shoulder, sleeve, hem, neck opening. Tolerance is not optional: ±1 cm on a body length is normal, and without it every measurement is a dispute.
Name the trims and the finish
Zipper type and length, drawcord, eyelets, elastic, interfacing, main label, care label, hangtag, polybag. Print method matters too: screen print, DTG, embroidery, or a mix, and where each sits. A missing trim decision becomes a delay at the sample stage, not at the bulk stage.
Say what the garment is for
Retail price point, target market, wash expectations, packaging. This is the context that decides whether we propose a heavier fabric, a cheaper seam construction, or a different finishing route. It also tells us which details to protect when a cost target is tight.
What you get back
With a complete pack, sampling runs in 7 business days after details are confirmed. Incomplete packs do not fail loudly — they produce a sample that is technically correct and visually wrong, and that costs a round trip. Send what you have, marked clearly as confirmed or still open, and the pattern room will tell you what is missing before cutting.