The baritone ukulele is the largest of the standard ukulele sizes and will have both the deepest tone and loudest volume. Baritone ukuleles are typically tuned DGBE, similar to standard guitar tuning. The sound they produce is deeper than a uke, but not quite like that of a guitar either. Think of it as a guitar-ukulele hybrid of sorts.
For more information on the different sizes and styles of ukuleles we carry, check out our Ukulele Buying Guide.