Knots and Collars

Most men don’t realize it, but not all collars were created equal. Some are narrow, some are wide, some are in between. You can wear whatever type of collar you want, but how you tie your tie must match it, lest you look like an unprofessional fool. A four-in-hand knot for a tie on a spread collar? No. Wide collars require large knots; narrow collars require small knots.

Here’s how to tie the three basic types of knots: full windsor, half-windsor, and four-in-hand and how to match your knot to your collar:

Point → four-in-hand
Button down collar → half-Windsor
Medium spread → half-Windsor
Spread collar → full-Windsor

from: http://college.monster.com/benefits/articles/527-10-worst-fashion-mistakes-men