The pin measures 1/2'' x 3/4''. It appears to be in mint unused condition as pictured. Below here, for reference, is some additional information about the American Radio Relay League:
American Radio Relay League
From Wikipedia, the free encyclopedia
Abbreviation: ARRL
Motto: ''The National Association for Amateur Radio''
Formation: May, 1914
Type: Non profit organization
Purpose / focus: Advocacy, Education
Headquarters: Newington, Connecticut
RegionÊserved: United States
Membership: 154,000
President: Kay C. Craigie, N3KN
MainÊorgan: Board of Directors
Affiliations: International Amateur Radio Union
Budget: $14,000,000
Staff: 120
The American Radio Relay League (ARRL) is the largest membership association of amateur radio enthusiasts in the U.S.A.. ARRL is a non-profit organization, and was founded in May 1914 by Hiram Percy Maxim of Hartford, Connecticut. The ARRL represents the interests of amateur radio operators before federal regulatory bodies, provides technical advice and assistance to amateur radio enthusiasts, supports a number of educational programs and sponsors emergency communications service throughout the country. The ARRL has approximately 154,000 members. In addition to members in the U.S., the organization claims over 7,000 members in other countries. The ARRL publishes many books and a monthly membership journal called QST. The ARRL is the primary representative organization of amateur radio operators to the U.S. government. It performs this function by lobbying the U.S. Congress and the Federal Communications Commission. The ARRL is also the international secretariat of the International Amateur Radio Union, which performs a similar role internationally, advocating for amateur radio interests before the International Telecommunications Union and the World Administrative Radio Conferences.
The organization is governed by a member elected, volunteer Board of Directors. Each director serves a three year term and represents the members within their particular region of the country. The national headquarters facilities are located in Newington, Connecticut. Along with the administrative headquarters, the 7 acre site is home to amateur radio station W1AW. The ARRL Field Organization carries out local and regional activities across the United States.