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INSTRUMENT SIZING GUIDE
 
 
 
VIOLIN
ARM LENGTH
APPROX.  AGE
SIZE
0VER 23 5/8"
11 - ADULT
4/4
22 1/4" - 23 5/8"
9 - 11
3/4
20 3/8" - 22 1/4"
6 - 8
1/2
18 1/2" - 20 3/8"
4 - 7
1/4
16 7/8" - 18 1/2"
3 - 5
1/8
15 3/8" - 16 7/8"
3 - 5
1/10
14" - 15 3/8"
3 - 5
1/16
UNDER 14"
2 - 3
1/32
 
If you have the violin you are trying to size with the young student you can simply check it against the player's arm. Have the student hold the violin up on the left shoulder and extending out 45 degrees from their side (not in the front, not to the side.) Next, ask the player to reach from under the violin to the scroll of the violin with their outstretched left hand, curving the fingers around the scroll from below. If the left elbow is slightly bent and comfortable the violin is the proper size. If the elbow is straight and/or the player cannot reach the scroll the instrument is too large.
 
 
VIOLA
ARM LENGTH
APPROX. AGE
SIZE
OVER 27 1/8"
16 - ADULT
16 1/2"
26 3/8" - 27 1/8"
15 - ADULT
16"
25 5/8 "- 26 3/8"
14 - 15
15 1/2"
24 7/8" - 25 5/8"
13- 14
15"
23 1/4" - 24 7/8"
12 - 13
14"
21 7/8" - 23 1/4"
10 - 12
13"
20 3/8" - 21 7/8"
7 - 10
12"
18 1/2" - 20 3/8"
4 - 7
 11" 
 
Violas are fitted the same way as violins
 
 
CELLO
ARM LENGTH
 HEIGHT
SIZE
24" & UP
5' & OVER
4/4
22" - 24"
4'6" - 5"
3/4
20" -22"
4' - 4'6"
1/2
18" - 20"
3'6" - 4"
1/4
 
In order to fit a player to a cello, have them sit so their knees are bent at 90 degrees.  Adjust the height of the cello so the left knee touches the curve below the lower bout corner.  If the cello fits correctly the upper rim of its body will rest on the sternum (breast bone) and the lowest tuning peg will be near the left ear..  From this position the cellist should be able to comfortably reach both ends of the fingerboard.
 
 
B A
S S
HEIGHT
SIZE
4'5"
1/8
4'9"
1/4
5'1"
1/2
5'5" & OVER
3/4
               
One of the ways to fit the bass is to adjust the  endpin so the bridge of the bass is on the same plane with the knuckles (2nd joint of finger) of the students right hand. The important thing is not to set the bass too high. A bass set too high will cause the right elbow to bend too much, the angle of the bow to the strings will change, and ultimately, the result will be a poor sound. Size of the student's left hand is an important factor when selecting a bass size. The student's hand should be able to reach the notes in first position. It may be a stretch, but they should not need to shift to span a whole step between 1st and 4th finger.