Yes, they are oversized clubs.
They are aimed toward the mid to high handicap golfer who is looking for distance and forgiveness on the top of their list for a golf club. They also have a lower Center of Gravity which helps launch the ball higher and easier. The larger sweet spot on the clubface also makes it easier to hit these irons. , The Callaway Big Bertha irons are oversized. They are larger and more forgiving irons. These are some of the easiest to hit irons out there to hit. They also help square the face at impact which helps avoid a slice or push miss. These oversize irons are very easy to hit for players of all skill sets. , This will answer the question of whether or not the Big Bertha irons are oversized
Yes, the Big Bertha B21 irons are oversized. They have a larger clubface and thicker sole to allow for maximum forgiveness.
The Callaway Big Bertha B21 irons are oversized due to their larger face and thicker sole.