What size guitar should I get for my 9 year old?
Buy a 36 in (91 cm) guitar for a 9- to 12-year-old child. This is a 3/4 size guitar, and you’ll find a wide range of options because it’s the most commonly sold child size. Pick a 36 in (91 cm) guitar if your child is almost ready for a full-size guitar but is still too small to comfortably play it.