Ruth Bader Ginsburg is depicted on a new USPS stamp

Ruth Bader Ginsburg put her stamp on U.S. law — and now the U.S. is putting the late Supreme Court justice on a stamp.

The U.S. Postal Service recently unveiled a new Forever stamp featuring Ginsburg, citing her status as "a passionate proponent of equal justice and an icon of American culture."

The new stamp shows Ginsburg wearing the white beaded collar with an intricate geometric pattern that she said came from Cape Town, South Africa.

Ginsburg's "dissent collar" — a darkly formal and hard-edged version signaling her opposition on a key...