Order bespoke and you can get it as wide as you want. Then you'll look as good as this guy:
Ehhh come to it...I don't think I have either. Just wanted to use that picture.
Yes, the Tom Ford ones are wide. I've seen some RLPL wider ones too.
I also picked up some E. Marinella knits in Italy a few months ago that were fairly wide. Though not quite as wide as the Tom Ford.
Currently sold out, but Knottery ties are well regarded here, and they are 8.5 cm. Kent Wang has them in 7 cm.
Light blue. Navy. White. Cream. Light pink.