Ukulele
Ukuleles commonly come in four sizes: soprano, concert, tenor and baritone. Sopranino and bass ukuleles also exist. Sopraninos are tuned to standard tuning, however, baritone ukuleles are tuned to D, G, B, E (the top four strings of a guitar). Bass ukuleles are tuned E, A, D, G (bass guitar and double bass tuning).