What other shape could they be. Thats the best shape they could be and if they were some funky shape they would be hard to roll.
I meant the shape compared to normal handrolled cigarettes. they usually have the same width at both ends, and a joint is wider at the one, and smaller at the other....
Its because most ppl put more in the front than the back quite handy when ur smokin with someone you dont like lol.
The shape of the joint belongs to how you built it.You can roll it like a cigarette.I think that the conic (?don't know,in Germany it's called konisch)shape is the most economic and tasty one!