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THE SCIENCE TeeCHER :: Math Ties :: Math Tie Pins

Pi Day is almost here!

Celebrating on Friday, March 12th? At this point we recommend paying extra for Express Mail shipping.

Celebrating on Sunday, March 14th? Try to order by mid-day Wednesday, March 10th for delivery on or before the 13th . Orders placed by mid-day Thursday still have a good chance of arriving on the 13th. We also offer overnight shipping to most US zip codes.

This deadline is based on USPS guidelines and our experience. Priority Mail orders placed by this deadline are very likely to arrive on time, but are not guaranteed to do so.

See Pi T-shirts, Ties, Earrings, Pins, & Tote Bags

Math Tie Pins

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Pi Lapel or Tie Pin

Actual height 1/2 inch (13 mm).
Tie pin has chain and bar for attaching tie to front of shirt.
Handcast in USA from lead-free pewter using renewable energy. Posts, chains, and bars of stainless steel.

Pricing: Lapel Pin $6. Tie Pin $8.

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Infinity Lapel or Tie Pin

Designed as an Infinity pin. Makes a pretty good Mobius strip, too.
Actual size 5/8" wide by 1/4" high (16 mm wide by 6 mm high).
Tie pin has chain and bar for attaching tie to front of shirt.
Handcast in USA from lead-free pewter using renewable energy. Posts, chains, and bars of stainless steel.

Pricing: Lapel Pin $6. Tie Pin $8.

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Square Root Radical Sign Lapel or Tie Pin

Actual size 13/16 inch wide by 1/2 inch high (20 mm wide by 13 mm high).
Tie pin has chain and bar for attaching tie to front of shirt.
Handcast in USA from lead-free pewter using renewable energy. Posts, chains, and bars of stainless steel.

Pricing: Lapel Pin $6. Tie Pin $8.