There is Around the Ear which is circles around the ear and is the largest form of headphones. The use of bose on ear headphones is stared many years ago in walkmans as the style and use of walkman was established in early 80s as they contains a simple cassettes and now you can see different cd players and I pods which are used to listen song as they mostly used by the youth of our country you can observe that every guy has bose on ear headphones.