Or even 8x10. Last winter I was up for a printing session and realized I had printed every 8x10 negative I had (less than 50 at the time) and had nothing to do.
At least two thirds of my backlog are 8x10 negatives. There are perhaps about 30-40 11x14 and 10x12; the rest are 4x5. I'm not counting the small format stuff for which I'll probably use an 'electro-optical' process.