What are the typical instrumentation of a swing era big band?

A typical swing era big band usually consists of 12 to 25 musicians, featuring a standardized instrumentation of brass, woodwinds, and rhythm sections. The brass section generally includes trumpets and trombones, while the woodwinds consist of saxophones (alto, tenor, and baritone). The rhythm section is typically made up of piano, guitar, bass, and drums. This arrangement allows for rich harmonies and dynamic arrangements, which are characteristic of the swing style.