The Bart and the Homer are both unopened in their original packaging.
The Marge is not in its packaging so I'm listing it as 'used' even though I don't know if anybody actually put it on.
They are life-size for an adult head. They may be latex, in any case they are a rubbery material.
If you want to collect in person, you must pay at the time of collection, not by eBay payment beforehad.
UK buyers, I always combine postage where possible.