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How To Size For An Instrument

The best way to size your child is to bring them into our shop and have someone on staff size them or to have your teacher size them. When this isn't possible, there are a few options.

The charts below show approximate arm lengths for violin and viola, and approximate heights for cello and bass.

Violin Sizing

Arm Length Is At Least Violin Size
17" 1/16
19" 1/10
20" 1/8
22" 1/4
23.5" 1/2
25" 3/4
27" 4/4
*This chart shows approximate arm lengths.

Viola Sizing

Arm Length Is At Least Viola Size
17" 1/16
19" 1/10
20" 1/8
22" 11"
23.5" 12"
25" 13"
27" 14"
*This chart shows approximate arm lengths.

Cello Sizing

Height Range Cello Size
48" to 50" 1/8
51" to 54" 1/4
55" to 58" 1/2
59" to 62" 3/4
63" and up 4/4
*Please Note: All sizes are for German instruments.

Bass Sizing

Height Range Bass Size
48" to 50" 1/10
51" to 54" 1/8
55" to 58" 1/4
59" to 62" 1/2
63" and up 3/4
*Please Note: We do not carry basses larger than 3/4 size.

Additional Resources

Carriage House Violins

Carriage House Violins

Located in Newton, Massachusetts, Carriage House Violins is the instrument sales division of Johnson String Instrument.

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Whether searching for a job, learning about the "Mozart Effect," looking for a summer music camp, or choosing the right instrument string, you need look no further.

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The Johnson String Project

Johnson String Project

A charitable foundation whose goal is to provide high-quality instruments to children who live in underserved communities and who are participating in El-Sistema-inspired programs in Massachusetts.

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The Johnson String Blog

JSI Blog

Information and helpful articles about the music and instruments we love.

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JSI Media


Helpful "how to" videos and useful information about JSI and the products and services we offer.

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