Unlike the Greeks and Romans, one of the most important elements of Celtic clothing was trousers. They were usually composite (sewn together from a fairly large number of parts) and made of wool.
Like many other fabric items, not so many pants were found. They have different designs and patterns, respectively. Keep on the body through the belt. There are two sites found - Thorsberg and Damendorf, the latter of which is closer to the Celts in terms of dating: 1-2 centuries AD, Both finds are made of twill wool.
Damendorf pants consist of 7 parts: 2 legs, lower back, two lower legs, one front and one back. The main difficulty in the reconstruction will be removing the dimensions and creating a pattern. The pants should fit snugly enough on the wearer, so you can easily remove them from your tight-fitting modern pants. The most difficult part is the groin area. It depends on how much the pants will be comfortable to use and whether they will break.
Two pants were found in Thorsberg. The former have an almost completely independent pattern, and the latter are closer to the find in Damendorf. The main difference is the absence of an oval part in the front, and the legs are partially sewn together.