Is a 18 inch bass good for twelve year old?

It is not possible to determine whether a 18 inch bass is suitable for a twelve-year-old without considering specific factors such as:

* The child's physical size, strength, and overall musical ability.

* The scale length and string spacing of the bass as they relate to the child's hand size and finger span.

* The playability and sound quality of the bass.

Some general guidelines for choosing a bass for a child would be to consider:

* A scale length of 30-32 inches is generally recommended for younger players.

* A 4/4 size bass may be appropriate for a child who is tall and strong for their age, while a 3/4 size bass may be more suitable for a smaller child.

* Try out several basses before making a purchase, to find one that is comfortable to play and produces a good sound.

For more personalized guidance, it is best to consult with a bass teacher or other experienced musician who can help assess the child's needs and recommend a suitable instrument.