Ukulele Notes

There are different sizes, which have names

Soprano (smallest, strumming)
Concert (chords and some single notes)
Tenor (more mid range, more bass, bit louder, longer neck is good for single notes)
Baritone (almost guitar sized - the size of a tenor guitar, bass, louder. The string tunings change. E B G D instead of A E C G on a Tenor)

Smaller doesn’t sound great, doesn’t intonate (stay in tune) well Smaller the body, the higher the pitch (more treble)

between nut and saddle

13" Soprano
14-15" Concert
17" Tenor
19" Baritone

longer strings give you low notes

Conclusion: Concert ukulele is a good start