Quarter Inch Guitar Cable: One Cable, Three Names
Quick answer / TL;DR: Short answer: quarter inch guitar cable = 1/4 inch guitar cable = 6.35mm instrument cable – one product, three naming conventions (imperial fraction, shorthand, metric). The names describe the plug's barrel size; the buying decision rides on the spec underneath: TS mono wiring, a shielded run, capacitance, and plug quality.
'Quarter inch guitar cable' is the spelled-out name of the standard instrument cable – the same cord the market also calls '1/4 inch', '1/4"', and '6.35mm'. The three names draw three search populations to one shelf, and the naming spread is worth a guide: what each name emphasizes, where the variants came from, and why the spec – not the spelling – decides the purchase.
This is the naming guide: the three names, the measurements behind them, and the checks that hold under every spelling.
The Three Names, One Size
| The name | The convention | Where it appears |
|---|---|---|
| Quarter inch | The spelled-out imperial fraction | General retail, beginner-facing copy |
| 1/4 inch (1/4") | The fraction shorthand | Listings, spec sheets, pros' vocabulary |
| 6.35mm | The metric equivalent | International listings and engineering docs |
The three names are one measurement spoken three ways: the plug's barrel is a quarter inch, 0.25 inches, 6.35 millimeters. The market never standardized the spelling because the measurement never changed.
What the Name Does Not Say
- The size names the plug, not the wiring: instrument use means TS (mono, unbalanced) inside that size
- The size names the connector, not the quality: shield type and capacitance live in the spec, not the name
- 'Guitar cable' names the common use: the same cable serves bass, keys, and any instrument-level run
- The checks that decide: TS ends, shielded construction, the length matched to the rig, plug build
The name's job is the size; the buyer's job is everything else. A quarter-inch label on a stereo (TRS) cable is still the wrong cable for a mono guitar run – the name passed, the spec failed.
Reading a Quarter-Inch Listing
| The listing line | What to verify | ||||
|---|---|---|---|---|---|
| 'Quarter inch guitar cable, 20 ft' | The length and the size confirmed – then the spec: TS or TRS, shielded? | '6.35mm mono cable' | The metric name plus 'mono' – the TS confirmation in one word | '1/4" instrument cable, low capacitance' | The tone-relevant spec stated – the quality signal in the title |
Per-SKU capacitance and shield specifications are not provided in the knowledge base. The naming equivalence and the check set are the standard reference; confirm a specific cable's spec from its listing description or datasheet.
Real-World Applications
The search that spans the names
A buyer who searches 'quarter inch' and lands on '1/4 inch' listings: the equivalence read, the comparison continued on spec – the naming spread costing nothing.
The international order
A metric-market listing at 6.35mm: the conversion confirmed – the same plug, the same cable, the order placed across the naming boundary.
The spec-first habit
A shelf of quarter-inch cables at every price: the habit that pays – read TS-vs-TRS, shielding, and capacitance before the name. The names repeat; the specs differ.
Related reading: The size standard in full? Read the 1/4 inch instrument cable guide — blogs/news/1-4-inch-instrument-cable
Related reading: The wiring inside the plug? Read the ts-instrument-cable guide — blogs/news/ts-instrument-cable
Frequently Asked Questions
Is a quarter inch guitar cable the same as a 1/4 inch cable?
Yes – 'quarter inch' and '1/4 inch' are the spelled-out and shorthand forms of the same measurement: the 6.35mm plug. One product, three names.
What does 6.35mm mean on a guitar cable?
It is the metric expression of the quarter-inch plug's barrel diameter. International listings use it; the cable is the same 1/4-inch instrument standard.
Does 'quarter inch' tell me the cable is mono or stereo?
No – the size names the plug, not the wiring. Instrument cables are TS (mono); check the listing for TS or 'mono' to confirm, because stereo (TRS) cables wear the same size.
Which name should I search or order by?
Any of them resolves to the same shelf. Write the spec into the order line – length, TS mono, shielded – and the naming question stops mattering.
Looking for spec-matched instrument cables, shielded guitar cables, or custom-length audio runs for your store or project? Contact our engineering and B2B sales team for datasheets, compatibility test reports, and volume pricing. Request a quote or sample.