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.
The Helicore Bass String Medium Tension E String packaging features a chart comparing note, winding type, and tensions in lbs, with a white and blue design highlighting the Helicore logo for orchestral double bass players.
A twisted steel string core with metallic winding stands vertically against a blue background. Text above reads: MULTI-STRANDED STEEL CORE FOR ULTIMATE FLEXIBILITY in this Helicore Bass String Medium Tension E String for orchestral double bass. D'Addario logo at top.

D'Addario

Helicore Bass String Medium Tension E String | Orchestral Double Bass Strings

$60.89
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

Helicore Bass String Medium Tension E String | Orchestral Double Bass Strings

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.

D’Addario Helicore Bass String (E) Single String, Medium Tension | Orchestral Double Bass String

The D’Addario Helicore H610 3/4 Medium Bass String E is a go-to choice for bassists who need consistency, clarity, and reliable response. Built with a stranded steel core, these strings produce a warm, focused tone with excellent pitch stability and quick bow response.

Designed for 3/4 size double bass, this medium tension set offers a balanced feel under the fingers while maintaining strong projection across all registers. Suitable for both arco and pizzicato playing, Helicore strings perform equally well in school orchestras, professional ensembles, and studio environments.

Key Features:

  • Designed for 3/4 size double bass
  • Medium tension for balanced tone and playability
  • Stranded steel core for fast response and tuning stability
  • Warm, clear sound with strong projection
  • Performs well for both arco and pizzicato
  • Durable construction for long-lasting use

Why Players Choose Helicore:
Helicore strings are known for their quick response under the bow and smooth feel for pizzicato. Their versatility and consistency make them a reliable option for advancing students and experienced players alike.

Why try Helicores?

A dependable upgrade for any serious bass player. In stock and ready to ship.