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.

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.

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.

15/16" (24 mm) diameter.

Price: $5.

1 1/4" wide x 1" high (31 mm wide x 25 mm high).
Handcast in USA from lead-free pewter using renewable energy. Clasp pin of stainless steel.

Price: $14.

I (Heart) to Teach Mathematics Lapel Pin
15/16" (24 mm) wide by 11/16" (17 mm) high.

Price: $5.

1" (25 cm) wide x 7/8" (22 cm) high.

Price: $5.

This lapel pin is shaped as a blue ribbon award for math. Actual size 3/4" (19mm) wide by 1" (25mm) high.

Price: $5.

1 1/8" (28 mm) wide by 13/16" (20 mm) high.

Price: $2.50.