every year I grow my own and use them over Winter for a cooked vegetable ( no pies for us ! )
This year is strange - firstly because my butternuts are not doing that well and have been decimated by squash bugs, and something else - don't know. But mainly because my black futsu squash/pumpkins are enormous ! These are only supposed to get to 8lbs max, but all of mine are way beyond that, with roughly 2 months growing left. They are already 12 inches in diameter !
I have 3 that are crushing the tomato cages they grew on.
I can only explain it by saying that because I use seeds from the harvested fruit every year, somehow with this generation, there has been a reversion to a much larger ancestor pumpkin. For the past 3 years, they have been regular sized ! Nobody else in my area has a vegetable garden so I can't even say that its a cross-pollination issue. I can be sure once we start eating them as Futsu flesh has a distinctive taste and colour.