Classical guitar 3/4 vs 4/4 — a guide for kids and adults with small hands
Classical guitar is the standard first instrument for kids, so questions about size come up a lot. The guide is height and arm length, not age — and adults with small hands have options too.
Sizes are set by scale length (string length)
| Size | Scale length | Guideline | Example |
|---|---|---|---|
| 4/4 (full size) | 650mm | 150cm (4'11") tall or more; middle school to adult | Yamaha C40, Cort AC100, Yamaha CG122 |
| 3/4 | About 580mm | 130–150cm (4'3"–4'11") tall; elementary grades 3–6 | Yamaha CS40, Korean-brand 3/4 models |
| 1/2 | About 530mm | 110–130cm tall; elementary grades 1–2 | Yamaha CGS102A and similar |
These are rough guides. With the guitar on your left thigh, if your left hand reaches the 1st fret comfortably and your right arm falls naturally over the body, it's the right size.
Pros and cons of smaller sizes
The pros: easier on the hands (the frets are closer together and string tension is lower) and lighter. The cons: a quieter sound and weaker bass. It's not a bad guitar, just a small one. Even after moving up to a 4/4 as adults, people keep using it for travel and practice.
When to size up
When they're over 150cm tall, or when spreading their fingers from the 1st to the 4th fret has become comfortable. Usually around 6th or 7th grade.
Buying a big one early because "they'll grow into it" is the fastest way to ruin their wrists. Replacing the guitar every 2–3 years while they grow ($119–199) costs less than fixing bad posture.
If you're an adult with small hands
Stay with 4/4, but there are two alternatives.
- A crossover (46–48mm neck width, cutaway and pickup): Yamaha NTX1, Cort CEC series. It's closer to an acoustic or electric neck, so it's comfortable for accompaniment and gigs.
- A full size with a 630mm short scale, made by some brands. If traditional classical pieces are your goal, this is the better choice.
A 3/4 isn't recommended for adults because the sound falls short.
What really matters in a child's first guitar. After size comes the setup. People assume nylon won't hurt, but on a classical with high strings, a child's hand can't press them down. Get a $50–110 setup from the start.