20 stamps/page * 5 pages. You got 100 stamps in total.
Background:
Each of the five new stamps in the pane of 20 features a musician, dressed in the traditional outfit of mariachi performers, playing one of five iconic mariachi instruments: guitar, guitarrón, vihuela, violin and trumpet. The geometric shapes in the background of each stamp are a nod to Mexican villages, where mariachi music originated.
“Mariachi” refers to several things: to the music itself; to an individual musician or an ensemble of musicians; and, when used as an adjective, to anything identified with the music — be it dance or costume or culture. The first known written reference to the word “mariachi” was made in the 1850s, but the music’s roots stretch back long before.