Getting the right tie length
When you feel that your tie comes out just too short after you have tied your necktie’s knot, it might be that you are using regular length ties when extra-long ties might be a better choice.
The difference between a regular tie and an extra-long one is three to four inches. Regular-length ties are normally 58/59 inches, whereas extra-long ones are usually 61/62 inches long.
As a rule of thumb, take your height in inches, and add your necksize in inches to it. If the number exceeds 91 inches you are better off with XL neckties.
As a general rule for all tie knots, the widest part of your tie should hang roughly at the same height as the upper edge of your leather belt, with the tie’s tip extending slightly below it. The tip of the narrow end would then hang wherever it may.
If you run into problems trying to get the length right with either the Windsor Knot or the Half Windsor Knot, try to let the wide end hang down as far as possible in step 1 of the instructions for these knots, so that when you cross the wide end over the narrow end, you can barely hold on to the narrow end. That will give you more length once you have eventually tied the knot.
However, it might also be the case that you are using regular length ties when extra-long ties might be a better choice.