Sometimes a small cup of coffee is all that is necessary to finish off a meal, and sometimes there isn't time for a full cup of tea. So it is with your pipe smoking. There are occasions when a small bowl of tobacco is all that is needed to fill a “smoke break” - or any 10 minute gap in the day or night. It could also be suitable for that richer tobacco you enjoy after dinner, like the small glass you use for a fine liqueur.
Because the bowls are small, the quality is frequently above that of a similarly priced larger pipe, and the design is often elegant which appeals to the lady pipe smokers.
Today the scope has extended considerably, including compact pipes which are more robust and suitable for “out and about”.So we have divided the range into “slender and elegant” and “short and chunky”. 
The next time you are going to a show, or have a break between meetings, just think how useful it would be to have a 10 minute pipe already filled, ready to smoke when the time comes - even if, with the current laws, you have to sit in your car.