The 8-cent Franklin stamp was not issued to address any specific rate. Rather, it was issued to pay multiple rates. This stamp underwent four renditions, differentiated by a variety of papers, coils, watermarks, and perforations.
As a single stamp, the 8-cent Franklin could have paid the four-times domestic first-class rate. Patrons also combined it with other denominations to fulfill large weight and foreign destination rates. By the time the last 8-cent Franklin stamps were sold, more than 800 million had been issued.