Children typically use smaller string instruments than adults. Violins are made in so-called
fractional sizes for young students: Apart from full-size (4/4) violins, 3/4, 1/2, 1/4, 1/8, 1/10, 1/16, and even 1/32-sized instruments exist. Extremely small sizes were developed, along with the
Suzuki program, for violin students as young as 3. Finely made fractional sized violins, especially smaller than 1/2 size, are extremely rare or non-existent. Such small instruments are typically intended for beginners needing a rugged violin, and whose rudimentary technique does not justify the expense of a more carefully made one.
These fractional sizes have nothing to do with the actual dimensions of an instrument; in other words, a 3/4-sized instrument is
not three-quarters the length of a full size instrument. The body length (not including the neck) of a full-size, or 4/4, violin is about 14 inches (35 cm), smaller in some 17th century models. A 3/4 violin is about 13 inches (33 cm), and a 1/2 size is approximately 12 inches (30 cm). With the violin's closest family member, the viola, size is specified as body length in inches or centimeters rather than fractional sizes. A
full-size viola averages 16 inches (40 cm).
Occasionally, an adult with a small frame may use a so-called 7/8 size violin instead of a full-size instrument. Sometimes called a
lady's violin, these instruments are slightly shorter than a full size violin, but tend to be high-quality instruments capable of producing a sound that is comparable to that of fine full size violins.