For example: 104. 14cm/25.4cm = 4 1, that is, the length of a guitar104.14cm is 41inch.
And so on.
39 inches is the standard size for classical guitars.
In China, there are 32, 34, 36, 38 and 39 inches of classical guitars, but there are no 4 1 and 42 inches. Folk guitars are 38, 39, 40, 4 1, 42 inches. There is also a guitar less than 32 inches in ukulele.
Extended data:
Guitar can be roughly divided into acoustic guitar, electric guitar and classical lyre according to the different structure and sound principle.
1, acoustic guitar: folk guitar, fingered guitar, flamenco guitar.
2. Electric Guitar: Standard electric guitar and bass electric guitar.
Baidu encyclopedia-guitar