ASTM F136 Implant Grade Titanium Coffin AQ Flatback Labret Stud
Pheenix utilizes Thickness, Diameter, Length, and Attachment Size as our standard measurements for jewelry. Please refer to our following piercing size chart as an example.

Ear Piercing Chart
- 'Thickness' is the distance through the wire which is usually covered by the skin.
- 'Diameter' measures the distance from one side to the opposite side of a straight line passing through the center of the inner circle of a ring.
- 'Length' represents the distance between attachments.
- 'Attachment' refers to the distance of the widest dimension of the decorative end of a piece of jewelry.
In order to provide you with precise information about our product sizes, we utilize the Metric system which measures in millimeters (mm), as you can see below in one of our piercing size chart (specifically ear piercing chart). This ensures an accurate understanding of our products' dimensions.
| Gauge | Metric | Inch |
| 22 | 0.6mm | 0.024 |
| 20 | 0.8mm | 0.031 |
| 18 | 1.0mm | 0.039 |
| 16 | 1.2mm | 0.047 |
| 14 | 1.6mm | 0.063 |
| 12 | 2.0mm | 0.079 |
| 10 | 2.5mm | 0.098 |
| 8 | 3.0mm | 0.118 |
| 6 | 4.0mm | 0.157 |
| 4 | 5.0mm | 0.197 |
| 2 | 6.0mm | 0.236 |
| 0 | 8.0mm | 0.315 |
| 00 | 10.0mm | 0.394 |
Have further questions about our ear piercing chart? Either check out our FAQ or get in touch.
Meet the Coffin Aqua Flatback Labret Stud, set with an aqua-blue stone, cut into a coffin shape, an elongated hexagon that catches the light along its faceted edges, sitting flush against your skin with nothing raised or poking out, which keeps it low-profile and comfy for everyday wear. Wear it in either nose, tragus, conch, helix, ear lobe, or ear piercings. For a nostril piercing, the low, flush profile helps keep it comfortable day and night, even when you blow your nose. Wear it solo for a proper stand-out moment, or stack it in with plainer studs and rings for contrast.
It's made from ASTM F136 implant grade titanium, the medical-grade standard piercers recommend for piercing jewellery. It's hypoallergenic and nickel-free, so it's a safe choice even with sensitive skin or a known metal allergy, and it can also be safely sterilised before your appointment. It won't corrode, discolour, or react to sweat, sunscreen, or salt water. It's lightweight and strong, and is suitable for either a brand-new piercing or for one you've had for years.
It comes in 16 gauge; post lengths from 4mm to 16mm. Full options are listed above the Add to Cart button. Check the size guide first if you're not sure what you're currently wearing.
Specifications
- Design: Coffin Aqua Flatback Labret Stud
- Material: Solid ASTM F136 implant grade titanium, hypoallergenic, nickel-free, safe to sterilise
- Fit: Internally threaded. The flat backing stays fixed in place. Just screw the top on to secure it. Sits flush with nothing poking out.
- Sizing: 16 gauge; post lengths from 4mm to 16mm
- Suitable piercings: nose, tragus, conch, helix, ear lobe, and ear piercings
- Care: Clean with saline solution or Pheenix Piercing Spray; avoid alcohol, peroxide, and harsh chemical cleaners
FAQs
Is solid ASTM F136 Implant Grade Titanium safe for a new piercing?
Yes, you're covered, whether it's fresh or still healing. It's made from solid ASTM F136 implant grade titanium, the medical-grade standard piercers recommend for this stage. It's hypoallergenic and nickel-free, so you don't have to worry about a surface coating wearing away and exposing unknown metals underneath. It's a suitable choice for sensitive skin and people with metal allergies.
What size does this come in?
It comes in 16 gauge, the standard thickness for this type of jewellery. Post lengths range from 4mm to 16mm to suit different piercings. Full options are listed above the Add to Cart button. Check the size guide if you're not sure what you're currently wearing.
Which piercings can I wear this in?
You can wear this in nose, tragus, conch, helix, ear lobe, and ear piercings. Check with your piercer if you're not sure it'll work for your specific placement or anatomy.
How do I clean and care for it?
A saline solution or Pheenix Piercing Spray is all it needs. Skip the alcohol, peroxide, and harsh chemical cleaners, since they'll dull the finish over time. Titanium won't corrode or discolour with normal wear.
