A 4/4 violin — the full size instrument — has a body length of 14 inches (35.5 cm) and an overall length of 23.5 inches (60 cm), with a 12.8 in (32.5 cm) string length. It suits players with an arm length of 22.5 inches or more, which most people reach around age 11 or 12. Every adult violin is a 4/4 unless it is specifically labelled 7/8.
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Full size violin measurements are standardised to within a few millimetres across makers and price points.
| Measurement | Imperial | Metric |
|---|---|---|
| Body length | 14 in | 35.5 cm |
| Overall length | 23.5 in | 60 cm |
| String length (nut to bridge) | 12.8 in | 32.5 cm |
| Upper bout width | 9.3 in | 23.5 cm |
| Recommended arm length | 22.5 in and up | 57 cm and up |
| Typical bow length | 29.5 in | 75 cm |
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Quick answer: A 4/4 violin has a 14 in (35.5 cm) body and measures 23.5 in (60 cm) end to end. The "4/4" is a size name, not a fraction of anything — it simply means full size.
Arm length decides the size, not age. Measure from the base of the neck, along the outstretched arm, to the middle of the palm with the arm held out to the side.
| Arm length | Violin size | Typical age |
|---|---|---|
| 20.5 – 22 in | 3/4 | 9 – 11 years |
| 22 – 22.5 in | 7/8 | 11+ and small-handed adults |
| 22.5 in and up | 4/4 (full size) | 11+ and adults |
The playing check is just as reliable: hold the violin under the chin and extend the left arm to the scroll. If the fingers curl comfortably around the scroll with a slight bend at the elbow, the size is right. A straight, locked elbow means the instrument is too long; fingers reaching well past the scroll means it is too short. The full violin sizes chart covers every fractional size from 1/16 upward.
The three sizes an older student or adult is likely to be choosing between.
| Size | Body length | Overall length | String length |
|---|---|---|---|
| 3/4 | 13.25 in (33.5 cm) | 22.5 in (57 cm) | 12.2 in (31 cm) |
| 7/8 | 13.75 in (35 cm) | 23.25 in (59 cm) | 12.6 in (32 cm) |
| 4/4 | 14 in (35.5 cm) | 23.5 in (60 cm) | 12.8 in (32.5 cm) |
The step from 3/4 to 4/4 adds only 0.75 in of body length, but 0.6 in of string length — and that is what a hand actually feels. Wider spacing between the fingered notes is the reason a student moving up needs a few weeks to re-settle their intonation. The 7/8 exists precisely to soften that jump for adults whose hands never grow into a full 12.8 in string length.
| Accessory | 4/4 specification |
|---|---|
| Bow length | 29.5 in (75 cm), weighing 58–62 g |
| Case exterior | Typically 30 × 10 × 5 in (76 × 25 × 13 cm) |
| Strings | Marked 4/4 or "full size" — smaller-size strings will not reach |
| Shoulder rest | Sold as 4/4–3/4, adjustable across both |
| Chin rest | 4/4 fitting; height varies by model rather than by violin size |
Strings are the one accessory where the size label is not optional. A 3/4 set fitted to a 4/4 will not have enough winding to reach the pegs, and a 4/4 set on a smaller instrument leaves excess winding that slips. Bows and cases are more forgiving but a 3/4 bow on a full size violin is noticeably light and short at the tip.
A 4/4 violin has a 14 inch (35.5 cm) body and an overall length of 23.5 inches (60 cm), with a 12.8 inch (32.5 cm) string length. It is the standard adult and professional size.
Yes. 4/4 and “full size” are the same thing. The fraction is a traditional size name rather than a proportion — a 1/2 violin is not half the length of a 4/4.
Most players move to a 4/4 around age 11 or 12, but arm length is the real test: 22.5 inches or more from the base of the neck to the middle of the palm.
35.5 cm body length and 60 cm overall, with a 32.5 cm string length. The upper bout is 23.5 cm wide.
A 7/8 has a 13.75 in body against 14 in, and a 12.6 in string length against 12.8 in. The shorter string length is what makes it easier for adults with smaller hands; the sound is very close to a full size.
A 4/4 bow, 29.5 inches (75 cm) long and weighing 58 to 62 grams.
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