Set stance width per club by feet-to-shoulder width
For a wedge, the outsides of the feet line up with the outsides of the shoulders. For an eight iron or mid iron, the middle of the feet (the laces) line up with the outsides of the shoulders. For a driver, the insides of the feet sit more outside the shoulders. This progressively widens the stance from wedge to driver.
Channel: PorzakGolf
Watch official source at 0:47