For a bow tie, you need:
Basics ---> Needle + thread + sewing machine + measuring tape + scissors + pins etc
50cm x 50cm of woven fabric (at least)
Bow tie pattern
Traditionally, bow ties are made out of silk, but I didn't really have any silk on hand. I used a thin cotton poplin because it's easy to work with. I also didn't use interfacing, because I don't have any, but it's much better if it is used, because it makes the bow look stiffer and prettier when it's tied.