Keep outer size and inner clearance apart

Use two fields

Record listed outer or nominal diameter in one field and verified inner opening in another. Leave the second field unknown unless the maker provides it. A photograph on a model is not a calibrated inner-clearance measurement.

Identify closures

The clasp, hinge or post may occupy space that a simple circle diagram leaves empty. A geometry calculation cannot confirm whether a specific earring will fit a specific piercing or be comfortable.

A bounded comparison

Our converter accepts a known measurement and names it. It does not calculate a personal piercing fit, gauge requirement or safe opening. Ask an appropriate professional about an individual piercing concern.

A useful detail to retain

If a source supplies only outside diameter, a clean comparison can say outside diameter known; inner opening unverified. Leaving that second field empty is more informative than a precise-looking guess. A diagram showing tube thickness would still need to correspond to the actual selected closure and product before a clearance calculation could be trusted.

Before you decide

• Save exact material and selling unit
• Keep dimensions and their definitions
• Refresh the selected offer before ordering