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Violin and Viola



Have the student extend their arm straight out to their side, parallel to the floor, and in line with their shoulders. Next move their arm forward so that it is at a 45 degree angle to their shoulders.

Turn the student's palm up toward the ceiling. Place a measuring tape at the base of the student's neck, next to their left collarbone, and measure out to the center of the student's palm.

If you are sizing for a violin, compare the measurement you have taken with this table:

MeasurementInstrument Size
22"4/4 size
21"3/4 size
19.25"1/2 size
17.25"1/4 size
15.5"1/8 size
14.75"1/10 size
13.5"1/16 size
13"1/32 size


Pick the measurement that either matches what you measured or is smaller than your measurement. Do not pick a measurement that is larger than what you measured for your student.

If you are sizing for a viola, use this table:

MeasurementInstrument Size
26.25"16.5 inch
25.5"16 inch
24.5"15.5 inch
23.75"15 inch
22"14 inch
21"13 inch
19"12 inch
17.25"11 inch


Cello and Bass



When sizing for a cello or bass we will be measuring the size of the student's left hand. Have the student extend their fingers similar to holding up the number five. Make sure the student is not over extending their fingers and that they are evenly spread. Take your measurement from the tip of the index finger to the tip of the pinky.

Once you have this measurement, match it up to the following table for cello:

MeasurementInstrument Size
4.25"4/4 size
3.75"3/4 size
3.25"1/2 size
3"1/4 size
2.75"1/8 size
2.5"1/10 size


If you are sizing for a bass, use this table:

MeasurementInstrument Size
4.5"3/4 size
4"1/2 size
3.5"1/4 size
3"1/8 size


Again, pick the size that is smaller than your measured distance, not longer.