21 inches (about 55 cm in total length), the number of strings is about 12-14, the string sound: GCEA (from the fourth string to the first string). Referred to as S type, it is the smallest Ukulele type, suitable for beginners, its sound is the most crisp and bright, is the representative of Ukulele.
23 inches (about 60 cm in total length), the number of pianos is about 15-18, string sound: GCEA. Referred to as C type, it is slightly longer than S type, and the sound is richer than S type. Ukulele of this model is selected after a certain Ukulele basis, because the S character is small, and the T type is too large.
26 inches (about 68 cm in total length), the number of pianos is about 15-20, string sound: GCEA. Referred to as the T type, it is slightly longer than the C type, and the tone is richer than the C type. Many Ukulele-related performances are T-types, which can be said to be standard performance models. Of course, this piano is a bit big for girls.