How to Choose the Right Size for Your Piercing

Stud sizing isn’t one-size-fits-all.
The same stud can sit differently depending on your ear shape, piercing placement, and bar length.


This guide will help you choose the right fit with confidence.

Choosing the right back style affects comfort, security, and how your earrings feel throughout the day. Here’s a simple breakdown:

1. Barbell

A barbell is a straight post secured with a screw-on ball at the back. It’s most commonly used for cartilage piercings (such as helix, rook, and conch) because it’s very secure, less likely to loosen, and ideal for active, everyday wear.


2. Flat Back (Labret)

A flat back (labret) features a straight post with a smooth, flat disc at the back that sits flush against the ear. It’s a popular choice for the lobe, helix, tragus, and conch thanks to its comfortable, low-profile fit. Flat backs are often preferred for everyday wear (and sleeping) because they reduce pressure and movement.


3. Butterfly Back (Push Back)

A butterfly back is the traditional stud backing that slides onto the post. It’s best suited for standard lobe piercings and is easy to put on and remove, making it a familiar everyday option. It can also suit customers who find labret posts too thick. However, butterfly backs may press into the ear and are generally less comfortable for cartilage piercings or sleeping.

Common gauges:

  • 20G (0.8mm) – Thin (standard lobe piercing)
  • 18G (1.0mm) – Slightly thicker
  • 16G (1.2mm) – Common for cartilage

This is the straight bar that goes through your ear.

Post length affects comfort.

Too short → tight, pressure, irritation
Too long → movement, visible bar, shifting

The sizing shown above is a general guideline only. Ear anatomy, cartilage thickness, and piercing placement vary from person to person, so fit may differ. We always recommend checking the size of the jewellery you currently wear or consulting your professional piercer for confirmation.


If this is your first time purchasing flat back studs, please note that flat backs are commonly 16G (1.2mm), which can be thicker than standard butterfly-back earrings. If you’re unsure about your gauge or post length, feel free to email us before ordering — we’re happy to help you choose the right fit.

Not Sure?

Contact us at support@leajewels.co.uk, tell us:

  • Where the piercing is located
  • Whether it’s fully healed
  • If you prefer snug or slightly loose

We’ll recommend the best size for you.

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