There are four major sizes of ukuleles ranging from smallest to largest. They are Soprano, Concert, Tenor, and Baritone. There is no right or wrong size of ukulele for starters. Get what you feel most comfortable with, and what sound you like. The first three body shapes are tuned GCEA with the G string being tuned a whole step below the high-A string. Some players choose to string the instrument with a low G string to increase the bass tone of the instrument.
Sopranos are the smallest and generally have the least overall volume and bass frequency. Visually, they’re what most people think of when you say ukulele.
Concerts are a little bit larger and for most people the most comfortable size. The amount of volume and bass frequency is increased yielding a nice full tone.
Tenors are yet larger and great for people who are a little bit taller, or want more bass frequency. We frequently see our customers replace the standard high-G with a low-G string. It contrasts nicely in a group with other soprano ukuleles.
Baritones are the largest of the standard sizes and tuned EBGD like the 1st-4th strings of a guitar. They normally have two wound metal strings and two normal nylon or nygut strings. If you play in a ukulele group and you don’t currently have a baritone, pick one up and see how much you’ll enhance your group’s sound.