I'm doing a little project and I'd love to find out the cup sizes of various headphone models by various brands so as to see what are the most popular sizes, what is the range of difference between smaller and bigger cup sizes, and other similar things. This would be very valuable for this...

Hey man! do you have a specific question? Sucks to hear that you're not happy with your headphones. I'm thinking you would probably get more replies if you presented a clear question. Seems to me that you've presented a problem, but I'm not sure what kind of help you're expecting. Just saying...