If you are a person looking for to become a professional custom tailor then you should attain the certificate of high school diploma. The certificate in G.E.D is also necessary for you to become a good custom tailor. The process of sewing is the main duty of the tailor for mens tailored suits. So he should have some sufficient knowledge for how to do sewing. This cannot be evades at any cost. Being a tailor for custom suits, you should have some innovative thinking in order to bring new way of attractive stitching.