Jump Ring Gauge | ID (Inner Diameter) | Equivalent OD (outer diameter) | 18 gauge | 2.5mm | 4.5mm | | 3.0mm | 5.0mm | | 3.5mm | 5.5mm | | 4.0mm | 6.0mm | | 4.5mm | 6.5mm | | 5.0mm | 7.0mm | | 5.5mm | 7.5mm | | 6.0mm | 8.0mm | | 6.5mm | 8.5mm | | 7.0mm | 9.0mm | | 7.5mm | 9.5mm | | 8.0mm | 10mm | | 8.5mm | 10.5mm | | 9.0mm | 11mm | | 9.5mm | 11.5mm | | 10mm | 12mm | | 10.5mm | 12.5mm | | 11mm | 13mm | | 11.5mm | 13.5mm | | 12mm | 14mm | | | | 16 gauge | 3.5mm | 6.0mm | | 4.0mm | 6.5mm | | 4.5mm | 7.0mm | | 5.0mm | 7.5mm | | 5.5mm | 8.0mm | | 6.0mm | 8.5mm | | 6.5mm | 9.0mm | | 7.0mm | 9.5mm | | 7.5mm | 10mm | | 8.0mm | 10.5mm | | 8.5mm | 11mm | | 9.0mm | 11.5mm | | 9.5mm | 12mm | | 10mm | 12.5mm | | 10.5mm | 13mm | | 11mm | 13.5mm | | 11.5mm | 14mm | | 12mm | 14.5mm |
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