Types of Ukulele
21 inches. 12 to 14 frets on fingerboard. GCEA.
23 inches. Tuning is GCEA. 14 to 17 frets.
26 inches. This tuning is also GCEA but some tuned to GCEA that the 4th string is ‘low G’. 17 to 19 frets.
30 inches. 19 to 21 frets. The baritone tuning is DGBE. Tunes the same as top four strings of standard guitar DGBE tuning