Violin sizes explained: how to measure a child and what to check in a beginner violin

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Violins come in fractional sizes so that children can play an instrument that fits their arms and hands. Playing one that is too big causes strain and makes good habits almost impossible, so getting the size right matters more than almost anything else when buying or renting for a child.

The sizes

The full-size violin is called 4/4. Smaller sizes are named as fractions: 3/4, 1/2, 1/4, 1/8, 1/10 and 1/16, roughly from older children down to very young ones. Some makers also produce a 7/8, a slightly smaller full size that suits some adults and teenagers with smaller hands. The fractions are names, not exact proportions: a 1/2 violin is not half the length of a full-size one. Most adults play a 4/4. Children usually move through several sizes as they grow, which is one reason renting is popular.

How to measure a child

The common method, used by many string shops:

Ask the child to hold their left arm straight out to the side, palm facing up, level with the floor.
Use a soft tape measure (not a stiff metal one) and measure from the side of the neck to the middle of the palm.
Compare the measurement with a size chart from a string shop or teacher.

Charts differ slightly from shop to shop, so treat them as a starting point. Some shops also measure to the wrist rather than the palm, so check which measurement the chart you are using expects.

Check the fit in person

The best test is to try the instrument:

Place the violin under the chin in playing position.
Stretch the left arm along the underside of the violin. The child should be able to curl their fingers comfortably around the scroll (the curled end) with the elbow slightly bent.
If they can only reach the scroll with straight, stretched fingers, the violin is too big.

If a child is between sizes, choose the smaller one. A slightly small violin is easy to play; a slightly large one causes strain. A teacher who has seen the child play is the most reliable judge.

What to check in a beginner violin

Whether you rent or buy, ask a teacher or a specialist string shop to look it over. Things worth checking:

The bridge is upright, fitted to the top and correctly positioned, with strings sitting in shallow grooves.
String height over the fingerboard is not too high; high strings are hard to press down and make playing painful.
The pegs turn smoothly and hold their position without slipping or sticking.
Fine tuners are fitted, ideally on all four strings for a beginner, which makes tuning much easier.
No cracks or open seams on the body, especially around the edges and near the f-holes.
The fingerboard is smooth and firmly attached.
The bow has enough hair, the stick is straight when viewed down its length, and the screw tightens and loosens the hair properly.
The case protects the instrument and closes securely.

Very cheap violins sold online often arrive with poorly fitted bridges, pegs that will not hold and high strings. Such instruments can be adjusted by a luthier, but the cost of doing so can approach the price of a properly set-up instrument from a specialist shop. That is why many teachers recommend renting from, or buying through, a shop that sets instruments up before selling them.

Renting and growing

Many shops offer rental schemes where a child can move up a size as they grow, and some let part of the rent count towards a later purchase. Ask how sizes are swapped and what happens if the instrument is damaged.

Adults with small hands

If a full-size violin feels like a stretch, try a 7/8 or a 4/4 with a narrower neck before deciding. Comfort matters more than convention. What size did your child start on, and how did you know it was time to move up? Share your tips or questions in the comments.