Size & Gauge Reference – Jump Rings

This page defines the dimensional standards and display rules used by ONESIKA for jump rings. To ensure clarity, compatibility, and industry alignment, ONESIKA prioritizes outer diameter (OD) in product titles while publishing full dimensional details in product descriptions.

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1. Dimensional Terminology

Term	Full Name	Definition	Unit	Industry Practice	ONESIKA Standard
OD	Outer Diameter	The total outer diameter of a jump ring measured from outer edge to outer edge	mm	Commonly displayed in product titles	Primary display in product titles
ID	Inner Diameter	The inner open space diameter, excluding wire thickness	mm	Often omitted or shown only in specs	Always listed in descriptions
WD	Wire Diameter	Thickness of the wire used to form the ring	mm	Sometimes expressed as gauge	Always listed in descriptions
GA	Wire Gauge	Gauge system indicating wire thickness	AWG	Mainly used in US listings	Reference only

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2. ONESIKA Size Display Rules

Context	Display Format	Example
Product Title	Wire Diameter × Outer Diameter (OD)	0.6 × 4 mm (OD)
Product Description	WD × OD + ID (approx.)	0.6 × 4 mm (OD) / ID ≈ 2.8 mm
Specification Table	WD / OD / ID listed separately	WD: 0.6 mm · OD: 4 mm · ID: ≈ 2.8 mm
Images & Diagrams	OD emphasized, WD labeled	OD arrow + WD arrow

Display Principle ONESIKA displays jump ring sizes primarily by outer diameter (OD) to align with industry conventions, while providing full dimensional transparency in product descriptions.

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3. ONESIKA Jump Ring Size Reference

Inner diameter (ID) values are calculated using the standard geometric formula:

ID ≈ OD − (2 × Wire Diameter)

Wire Diameter (mm)	Outer Diameter (OD, mm)	Inner Diameter (ID, approx.)	Typical Use
0.6	3	≈ 1.8 mm	Delicate connectors, fine chains
0.6	4	≈ 2.8 mm	Earrings, light necklaces
0.8	5	≈ 3.4 mm	Bracelets, medium chains
0.8	6	≈ 4.4 mm	Bracelets, pendants
1.0	5	≈ 3.0 mm	Heavy-duty bracelet links
1.0	6	≈ 4.0 mm	Structural connections

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4. Measurement Notes

• All dimensions are expressed in millimeters (mm).

• Inner diameter values are approximate and may vary slightly due to manufacturing tolerances.

• OD is used as the primary reference to match common supplier and marketplace conventions.

• Full dimensional disclosure (WD, OD, ID) is provided to support accurate component matching and compatibility.

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5. Related Documentation

• Component Definitions – Jump Rings

• Compatibility Guidelines

• Material Standards & Plating

• Product Specification Schema