Ties
Josh Bach Mens Silk Necktie, Pi Symbol Math Tie in Blue, Made in USA
If Pi is the ratio of the circumference of a circle to its diameter, what happens if we place Pi on a necktie? Our best math guess is … the odds improve. Length of 58", Width of 3" Hand Finished in New York City Comes in cool tin can, ready to gift.
https://www.bizrate.co.uk/ties/josh-bach-mens-silk-necktie-oid10430796584.html