1.75" with metal covered back and fixed bar pin. No maker name. Button features same portrait as was used on 1920s postcards picturing her Angelus Temple. This opened in 1923. She was considered a pioneer in the use of radio and became the most publicized Christian evangelist of the decade. There is an extensive and fascinating article about her on Wikipedia. Only the second button we've seen in 50 years to picture her. NM displaying Mint.