The basic fundamentals of the swing are just that Basic. But having said that, they are the most important area of the swing that needs to be correct. You would not want a contractor building a house with a poor foundation. The house may look good when it’s finished, but it won’t last. Problems will erupt and your beautiful house/swing will crumble under pressure. These fundamentals are not difficult to do correctly and do not require strength, speed, or talent, but simply the understanding and wherewithal to do them correctly.
The stance width is your foundation. Set up too wide and you will create an unstable base that has too much slide. Set up too narrow and your legs and hips will rotate too much. A basic guideline for stance width is that wedges should be narrower than your shoulders, while mid irons is about shoulder width, and woods should be slightly wider than shoulder width. This is a simple task that any of your friends can eyeball for you and help you with your width.
Also look to other parts of your game when dealing with your stance width. When hitting a chip shot the feet should be about a clubhead width apart. When pitching, your stance should be wider than the clubhead width, but definitely not the same width as if hitting a pitching wedge. The key to figuring out when and where should your stance get wider for pitches is all about balance. This distance will be different for me than it is for you, for a female, or for a junior golfer. Once you feel that your swing is getting large enough that you start to lose balance you should widen your feet slightly until you regain that balance. This width in your stance will vary between one-clubhead widths for chips to about 3 clubhead widths for pitches of 50 yards.
Remember the foundation for your house and your golf game is the strength of your game. Take some time and learn the proper width of your stance and start building your game on a solid foundation.
Keep em Long and Straight,