Square packaging for a D’Addario Helicore Bass A String Medium Tension, featuring the word HELICORE over blue translucent circles, with text indicating 3/4 scale length, stranded steel core, and medium tension.
D'Addario Helicore Orchestral Bass Single D String, Medium Tension

D'Addario

D'Addario Helicore Orchestral Bass Single D String, Medium Tension

$47.29
No reviews
No reviews

✓ Ships in 1–2 business days. Free shipping on orders of $99+.

Unopened strings can be returned within 45 days.

Size:3/4
Quantity:
Pickup currently unavailable at 403 East Putnam Ave

D'Addario Helicore Orchestral Bass Single D String, Medium Tension

3/4

403 East Putnam Ave

Pickup currently unavailable

403 East Putnam Ave
Cos Cob CT 06807
United States

2036619500

Violin, Viola, Cello & Bass Size Charts

Use the charts below to find the usual size for a violin, viola, cello or double bass by age, height or arm measurement. If you'd like a personal recommendation, the free FitFinder tool further down the page gives you a recommended size and fit checklist in a few minutes.

Children grow at different rates, so measurements beat age. When a player falls between two sizes, choose the smaller one.

Violin Size Chart

How to measure: hold the left arm straight out to the side, palm up, and measure from the side of the neck to the middle of the palm.

Violin size Typical age Arm length (in) Arm length (cm)
4/4 (full) 11+ and adults 23+ 58+
3/4 9–11 22–23 56–58
1/2 7–9 20–22 51–56
1/4 6–7 18.5–20 47–51
1/8 5–6 17.5–18.5 44–47
1/10 4–5 16.5–17.5 42–44
1/16 3–4 15.5–16.5 39–42
Shop violinsRent a violin

Viola Size Chart

Violas are measured by body length in inches. Measure the arm the same way as for violin.

Viola size Typical age Arm length (in) Arm length (cm)
16"–16.5" Adults, larger hands 26+ 66+
15.5" Adults 25–26 64–66
15" 12+ 24–25 61–64
14" 10–12 23–24 58–61
13" 8–10 22–23 56–58
12" 7–8 20–22 51–56
Shop violasRent a viola

Cello Size Chart

Size a cello by the player's height. When seated, the knees should sit just below the lower bouts and the C-string peg should be near the left ear.

Cello size Typical age Player height Height (cm)
4/4 (full) 12+ and adults 5'0" and up 152+
7/8 Smaller teens and adults Around 5'0" (between 3/4 and 4/4) About 152
3/4 10–12 4'6"–5'0" 137–152
1/2 8–10 4'0"–4'6" 122–137
1/4 6–8 3'6"–4'0" 107–122
1/8 and 1/10 4–6 Under 3'6" Under 107
Shop cellosRent a cello

Double Bass Size Chart

Size a double bass by the player's height while standing. Most school players and many adults play a 3/4 bass, which is considered the standard full size.

Bass size Typical age Player height Height (cm)
3/4 (standard) 13+ and adults 5'0" and up 152+
1/2 9–13 4'6"–5'0" 137–152
1/4 7–9 4'0"–4'6" 122–137
1/8 5–7 Under 4'0" Under 122
Shop double bassesRent a bass

These charts are general guides. A teacher or one of our string specialists can confirm the fit, and rentals can be exchanged for the next size as your player grows.

Get a Personal Size Recommendation

Our free FitFinder tool walks you through a few measurements and gives you a recommended size, confidence score and fit checklist before you rent or buy, with support from Atelier's string specialists if you need help confirming the fit.

Violin, Viola, Cello & Bass Size Charts

Use the charts below to find the usual size for a violin, viola, cello or double bass by age, height or arm measurement. If you'd like a personal recommendation, the free FitFinder tool further down the page gives you a recommended size and fit checklist in a few minutes.

Children grow at different rates, so measurements beat age. When a player falls between two sizes, choose the smaller one.

Violin Size Chart

How to measure: hold the left arm straight out to the side, palm up, and measure from the side of the neck to the middle of the palm.

Violin size Typical age Arm length (in) Arm length (cm)
4/4 (full) 11+ and adults 23+ 58+
3/4 9–11 22–23 56–58
1/2 7–9 20–22 51–56
1/4 6–7 18.5–20 47–51
1/8 5–6 17.5–18.5 44–47
1/10 4–5 16.5–17.5 42–44
1/16 3–4 15.5–16.5 39–42
Shop violinsRent a violin

Viola Size Chart

Violas are measured by body length in inches. Measure the arm the same way as for violin.

Viola size Typical age Arm length (in) Arm length (cm)
16"–16.5" Adults, larger hands 26+ 66+
15.5" Adults 25–26 64–66
15" 12+ 24–25 61–64
14" 10–12 23–24 58–61
13" 8–10 22–23 56–58
12" 7–8 20–22 51–56
Shop violasRent a viola

Cello Size Chart

Size a cello by the player's height. When seated, the knees should sit just below the lower bouts and the C-string peg should be near the left ear.

Cello size Typical age Player height Height (cm)
4/4 (full) 12+ and adults 5'0" and up 152+
7/8 Smaller teens and adults Around 5'0" (between 3/4 and 4/4) About 152
3/4 10–12 4'6"–5'0" 137–152
1/2 8–10 4'0"–4'6" 122–137
1/4 6–8 3'6"–4'0" 107–122
1/8 and 1/10 4–6 Under 3'6" Under 107
Shop cellosRent a cello

Double Bass Size Chart

Size a double bass by the player's height while standing. Most school players and many adults play a 3/4 bass, which is considered the standard full size.

Bass size Typical age Player height Height (cm)
3/4 (standard) 13+ and adults 5'0" and up 152+
1/2 9–13 4'6"–5'0" 137–152
1/4 7–9 4'0"–4'6" 122–137
1/8 5–7 Under 4'0" Under 122
Shop double bassesRent a bass

These charts are general guides. A teacher or one of our string specialists can confirm the fit, and rentals can be exchanged for the next size as your player grows.

Get a Personal Size Recommendation

Our free FitFinder tool walks you through a few measurements and gives you a recommended size, confidence score and fit checklist before you rent or buy, with support from Atelier's string specialists if you need help confirming the fit.

The D’Addario Helicore Medium D String provides a warm, balanced tone with excellent clarity and response. Featuring a stranded steel core, it delivers quick bow articulation and stable pitch, making it a dependable choice for orchestral and ensemble playing.

Designed for 3/4 size double bass, this medium tension D string offers a comfortable feel and strong projection across a wide dynamic range. It blends smoothly within a Helicore set or works effectively as a replacement string.

Atelier for Fine Stringed Instruments selects strings trusted by teachers and serious players, ensuring reliable performance for every musician.

Key Features:

  • Designed for 3/4 size double bass
  • Medium tension for balanced tone and playability
  • Stranded steel core for quick response and tuning stability
  • Warm, focused tone with strong projection
  • Excellent for both arco and pizzicato
  • Ideal as a replacement or part of a full set

Why Players Choose Helicore:
Helicore strings offer a consistent, responsive playing experience. The D string delivers a strong core sound that blends well while maintaining clarity and control.