Violin sizes by age and arm length

The full chart

Not every maker offers every size. The Stentor Student II covers 4/4, 3/4, 1/2, 1/4 and 1/8, which spans roughly age five to adult — useful, because it means a family can stay with one instrument family through the whole growth run and know what they are getting each time.

How to measure, properly

Thirty seconds and a tape measure.

Stand the player upright, relaxed. Have them extend their left arm straight out to the side at shoulder height, palm facing up. Measure from the point where the neck meets the shoulder, along the arm, to the middle of the palm — not the fingertips, and not the wrist.

Fingertips is the most common error and it overshoots by two to three inches, which is a whole size. The reason the measurement stops at mid-palm is that the hand has to curl around the neck of the instrument, so the fingers are not part of the reach.

Why oversizing fails here specifically

On a guitar, an oversized instrument is uncomfortable and technically playable. On a violin it is neither.

The left hand has to reach around the neck with the fingers curved over the fingerboard and the wrist neutral. That position is what allows the fingers to drop onto the string vertically, which is what produces a clean note on a fretless instrument. There is no fret to catch a slightly misplaced finger.

If the arm is too short for the instrument, the player has three options and all three are bad. They rotate the shoulder forward, which strains it and pulls the violin off the collarbone. They collapse the wrist inward, which flattens the fingers so they land at an angle rather than vertically. Or they hold the instrument further forward, which puts the bow at the wrong angle to the strings.

Any of those becomes the habit within weeks. Undoing it later is harder than learning it correctly would have been, and a teacher will spend months on it.

When to size up

When the measurement says so, and not before. Practically: re-measure every six months, and always before a new school year or a new term of lessons.

There is also a real cost to being too small, which people forget. On an undersized violin the fingers crowd each other, the string spacing is tight, and intonation becomes harder than it should be because the margin for error shrinks. When the measurement crosses into the next band, move.

When it falls between two sizes, size down. A slightly small violin is cramped and entirely playable. A slightly large one is not.

Rent or buy through the growth years

A child starting at five will pass through three or four sizes before reaching full size around twelve. That is the argument for renting, and it is a good one — many shops apply rental payments toward an eventual purchase, and the rental covers the maintenance that a growing instrument needs.

Buying makes more sense in two situations: the player is an adult, and will stay on 4/4 permanently; or the child has reached 3/4 or full size, which is where they will stay. At that point a bought instrument is cheaper than continued rental and holds its value.

Either way, the specification that matters most on an inexpensive violin is whether it was set up in a workshop before it shipped — that is covered in our beginner violin picks, and what a complete outfit should contain is in what comes with a violin outfit.