I looked at a job 4 days before christmas, B&Q black polished for a kitchen in 600's, customer to be was having kittens because she'd had a
tiler booked in for weeks to do the job, he turned up, saw the size of the tiles and had stagefright with the sound of it "they we're 600's", customer had told him the size

,
tiler told them he didn't have a cutter big enough so couldn't do the job, so the customer said they would hire him one, then the
tiler told them he didn't want to do it because of the size.
I went to look at the job, medium sized floor, well, summit like 12 sqm and I was packed out leading upto xmas eve, so gave a silly price and never heard from them again

, there again, it was that kind of customer you just get the feeling that it could be a lot of hassle just getting paid once the job was done.
No one has since come at me with a tile of that size.