Staff bags are the golf bags that are used by tour pros, more to the point are carried by their caddies. The largest of all golf bags, the top opening of a tour bag is usually 8.5-9.5 inches. This allows for easy removal of any of the players clubs without them snagging or damaging each other.
The staff bag is noticeably larger than a cart bag, and as such is heavier, although modern materials and manufacturing techniques have reduce their overall weight. Due to the large size of this bag there is ample storage space for all the gear and equipment that a professional will need during a day’s play.
The staff bag is really only intended to be carried by a caddy, the cumbersome size and weight will fatigue the golfer who chooses to play as well as carry this type of bag. The staff bag tends to be two to three times the price of normal golf bags and so is cost prohibitive for most amateur players.