How to Measure an Earring's Gauge

The term "gauge" in the context of earrings refers to the thickness of the earring post or wire that goes through the pierced hole. The gauge of an earring is important as it determines the size of the hole in the earlobe or cartilage. In jewelry making and the piercing industry, it's crucial to ensure that earrings are the correct gauge for comfort and safety. To understand what different gauge numbers translate to in millimeters or inches, you can refer to this Ear Gauge to MM/Inches Size Chart.

If you want to measure the gauge of an earring at home, you have a few options. In this blog post, we'll go over the different methods you can use to measure an earring's gauge accurately.

Key Takeaways

  • "Gauge" refers to the thickness of the earring post or wire.
  • There are three main methods for measuring an earring's gauge: using a digital caliper, using a ruler, or using a gauge wheel (commonly known as a dedicated earring gauge).
  • Digital calipers provide the most accurate measurement, but rulers or gauge wheels can also be effective.
  • Precision is essential to ensure earrings fit comfortably and safely.

Method 1: Use a Digital Caliper

A digital caliper is a precision instrument that uses electronic sensors to measure the distance between two opposing sides. Here's how to use a digital caliper to measure an earring's gauge:

  1. Turn on the digital caliper and set it to the "mm" setting.
  2. Place the earring's post or wire between the jaws of the caliper.
  3. Gently close the jaws until they touch the earring.
  4. Read the measurement on the display screen.

Method 2: Use a Ruler

While not as precise as a digital caliper, a ruler can still be used to approximate the gauge of an earring:

  1. Place the earring's post or wire on a flat surface.
  2. Align the zero end of the ruler with one side of the earring.
  3. Read the measurement on the ruler opposite the other side of the earring.

Method 3: Use a Gauge Wheel (Dedicated Earring Gauge)

A gauge wheel is a tool specifically designed for measuring the thickness of wires, including earring posts and wires. They typically feature holes of varying sizes to determine the gauge:

  1. Insert the earring's post or wire into the holes of the gauge wheel.
  2. Find the hole where the earring fits snugly without forcing it.
  3. Read the gauge size indicated next to that hole.


Measuring an earring's gauge is an essential step to ensure a proper fit and comfort. Whether you opt for a digital caliper, ruler, or a gauge wheel, it's important to measure with care. With the right tools and techniques, you'll be able to determine the gauge of any earring with confidence. For a quick reference on gauge sizes and their corresponding dimensions, check out this Ear Gauge to MM/Inches Size Chart.

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