Each style gets its own tech pack. This means one garment per tech pack, not one look or one set per tech pack. If your garment has multiple variations, though, what do you do? There is a fine line between design variations and a new style. How do you know if your variations count as one style or if each variation needs its own tech pack?
First off, let’s talk about what does go in the same tech pack. All colorways go in one tech pack. All sizes go in one tech pack. (There are some exceptions of course, but the vast majority of the time, this is how it goes.)
For design variations like different collars or lengths, though, it depends.
My general rule of thumb is that if the construction (sewing) has to change, it is a new style.
For example, if you have set-in sleeve and sleeveless design variations, they will need to be sewn differently. The set-in sleeve will be attached to the bodice, while the sleeveless armholes will need some sort of edge finish (plus the bodice patterns are rarely the same).
For variations that are purely length differences with no construction changes – like short, regular, and tall inseam options – these I usually put all in the same tech pack.
Another way to think about this is would you put all these options on the same product page on your website? If you would create a different product page for the variations, it is probably a new style and should get its own tech pack. If you would put it as an option on the same product page – like you do for sizes – then it likely can go in the same tech pack.
Before putting any additional design options in the same tech pack, it is best to check with your factory on how they’d prefer to receive these variations. If your factory prefers the variations all in one tech pack, do that. If they want them separate, do that. In the end, it is about what makes the production of your garment and all its variations the easiest.