Body size: Ukuleles come in various sizes, including soprano, concert, tenor, and baritone. The tenor ukulele is typically the largest size, and it produces a deeper, richer sound than the smaller sizes. This makes it a good choice for singers with lower voices, such as tenors.
String type: Ukuleles can have either nylon or fluorocarbon strings. Nylon strings are softer and easier on the fingers, making them a good choice for beginners. Fluorocarbon strings are brighter and louder, making them a good choice for experienced players who want a more powerful sound.
Scale length: The scale length of a ukulele is the distance from the nut to the bridge. A longer scale length produces a higher tension on the strings, which results in a brighter, louder sound. A shorter scale length produces a lower tension on the strings, which results in a warmer, softer sound.
Personal preference: Ultimately, the best way to choose a ukulele is to try out different sizes and types and see what feels and sounds best to you.