I confess that I do not understand and never have understood what Flusser means by applying the term "cutting in half" to the length of a suit coat. Â Suits are after all made of the same cloth, and the eye tends not to focus on where coat ends and trousers begin. Â I agree that "cutting in half" is an issue with respect to odd jackets, which is why, all other things being equal, shorter men look better in suits. Â But this is true no matter what the length of the coat. As to "the rules": I believe that the only inviolable rule here is that the coat must cover your behind. Â Anything less looks feminine. The other rule is not so much a rule but a principle: everything in proportion. Â The problem is: what is the right proportion? Â It would be nice if a simple formula like "under the collar to the floor divided by two" worked for every guy. Â But it doesn't. Â Some have longer torsos, others shorter. Â Also: it is true that in general the goal of getting coat length right is to lengthen the leg line. Â But that should not be the goal for someone 6'6" who is 3/5 leg and 2/5 torso. Â Etc. Â In general, the shorter you are, the longer you want the leg line to be. Â Hence a ratio of coat-to-trouser that favors the legs is good. Â The taller you are, the more you want the ratio to be even. Â I don't think anyone benefits from a coat that is more than half their collar-to-floor measurement. Therefore, the only reliable guide is the eye. Â Determine your needs from your height and build, and then try on a ton of coats until you find the length you like. Â Then measure it from under the collar along the center backseam. Â That's your ideal coat length. Â Or let a tailor make you one, and ask him to pin at a few different lengths during the basted stage. Â And the length you like best is henceforth your coat length.