The Baritone is the biggest of the standard ukulele types (ie not including u-basses and the like). It's very much like a small 4-string guitar and is tuned like the top DGBE strings of a guitar without a re-entrant D string. Mostly used for rhythm accompaniment.
Kala KA-MBG curly mango baritone ukulele. Curly Mango Body, Solid Mahogany Neck & Binding, Custom Amber Tuners.