Helicore Viola Strings


  • Groundbreaking core technology engineered by D’Addario
  • The most popular viola string for traditional and alternative styles, plus advancing student players
  • Fast, flexible, and responsive with a clear and focused articulation
  • Pairs exceptionally well with a wide variety of instrument types and musical styles
  • All D’Addario strings are designed, engineered, and manufactured in the USA
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Helicore viola strings are crafted with a multi-stranded steel core, resulting in optimal playability while producing a clear, warm tone. These strings are known for their quick bow response and excellent pitch stability, making them a go-to choice for players of all musical styles.

In comparison, Helicore Viola strings are similar to Thomastik Spirocore Viola strings.

Helicore viola strings are sized by the instrument’s body length in inches. To measure your viola to determine the size string your instrument needs: Turn the instrument over and measure its body length along its longest axis (not including the neck or scroll). Then, select the appropriate size string based on that measurement here:

12” = Extra-Extra-Short Scale
13”-14” = Extra-Short Scale
14”-15” = Short Scale
15”-16” = Medium Scale
16”-17” = Long Scale
17”+ = Extra Long Scale

If you measure 15.5″ for instance, you will need a medium scale D’Addario viola string (for instruments 15″ to 16″ inches in length). 

NOTE: The instrument sizes on or website are recommendations only. 

D'Addario Viola String Size

Extra Long Scale for 17"+ Violas, Long Scale for 16" to 17" Violas, Medium Scale for 15" to 16" Violas, Short Scale for 14" to 15" Violas

String Tension

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Viola String

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