Versatile Black Onyx Armor Stud Earrings
Choosing the right size for your jewelry is crucial for a perfect fit. Below are the simple steps and guides to help you pick the size that best suits you.
Bracelets Size Guide
To ensure your bracelet fits perfectly, follow these steps to measure your wrist:
- Use a flexible tape measure around the smallest part of your wrist.
- If you don't have a tape, use a piece of string and then measure it with a ruler.
Measure Your Wrist:
1. Prepare Your Measuring Tool
You may use any of the following:
-
A flexible tape measure
-
A piece of string
-
A strip of paper (useful when no tools are available)
2. Measure Correctly
-
Wrap the tape, string, or paper around the widest part of your wrist, near the wrist joint.

-
Ensure the loop is snug but not tight—similar to the tension you expect from a comfortable bracelet.

- If using paper or string:
- Mark the overlap point
- Lay it flat
- Measure from the starting edge to the mark using a ruler
3. Universal Sizing Rule
Use the following general guide if you want to double-check your measurement:
-
Snug Fit: Wrist size + 1.0 cm (approx. +0.4 in)
-
Relaxed Fit: Wrist size + 1.5–2.0 cm (approx. +0.6–0.8 in)
-
Loose Fit: Wrist size + 2.0–2.5 cm (approx. +0.8–1.0 in)
4. Wrist Size → Bracelet Recommendation
This table matches your wrist measurement to the correct IDEAGEMER bracelet size.
Recommendations include Snug, Relaxed, and Loose fits.
Wrist Measurement → Recommended Bracelet Size
| Wrist Size (in) | Wrist Size (cm) | Snug Fit | Relaxed Fit | Loose Fit |
|---|---|---|---|---|
| 6.3 – 6.6 in | 16.0 – 16.7 cm | 17 cm / 6.7 in | 18 cm / 7.1 in | 19 cm / 7.5 in |
| 6.6 – 7.0 in | 16.8 – 17.7 cm | 17 cm / 6.7 in | 18 cm / 7.1 in | 19 cm / 7.5 in |
| 7.0 – 7.3 in | 17.8 – 18.7 cm | 18 cm / 7.1 in | 19 cm / 7.5 in | 20 cm / 7.9 in |
| 7.4 – 7.7 in | 18.8 – 19.7 cm | 19 cm / 7.5 in | 20 cm / 7.9 in | 21 cm / 8.3 in |
| 7.8 – 8.1 in | 19.8 – 20.7 cm | 20 cm / 7.9 in | 21 cm / 8.3 in | 22 cm / 8.7 in |
| 8.2 – 8.5 in | 20.8 – 21.7 cm | 21 cm / 8.3 in | 22 cm / 8.7 in | 23 cm / 9.0 in |
| 8.6 – 8.9 in | 21.8 – 22.7 cm | 22 cm / 8.7 in | 23 cm / 9.0 in | Custom Size |
Key Tips
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For stacked or layered looks, measure each intended wrist position separately.
-
If you are between two sizes, we recommend sizing up for comfort.
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Measure in the afternoon for optimal accuracy, as wrists may expand slightly throughout the day.
Additional Notes
1. Initial Bracelet Stiffness
Sterling silver and chain-style bracelets may feel slightly rigid when new. They will naturally soften and conform to your wrist after 1–2 days of wear.
2. Impact of Multiple Charms
Each charm adds approximately 0.5 cm to the effective length.
If your bracelet carries 10 or more charms, consider adjusting the size accordingly or contact us for guidance.
In order to facilitate you to find the right chain length, we provide the general parameters.You can decide the chain length according to your preference.
Ring Size Guide

- Wrap a piece of string or floss around the base of your finger where the ring will sit.
- Adjust until it feels snug but not tight – imagine sliding the ring over your knuckle.

- Mark where the string overlaps, lay it flat, and measure the length in millimeters (mm).

- Use the circumference measurement (not diameter) to find your size in the table below.
Ring Size Chart:
| US Size | Inner Diameter (mm) | Circumference (mm) | EU Size | UK Size |
|---|---|---|---|---|
| 7 | 17.3 | 54.4 | 54.4 | N½ |
| 8 | 18.1 | 56.8 | 56.8 | P½ |
| 9 | 18.9 | 59.3 | 59.3 | R½ |
| 10 | 19.8 | 62.1 | 62.1 | T½ |
| 11 | 20.6 | 64.7 | 64.7 | V½ |
| 12 | 21.4 | 67.2 | 67.2 | X½ |
| 13 | 22.2 | 69.7 | 69.7 | Z½ |
| 14 | 23.0 | 72.2 | 72.2 | Z+2 |
Measurement Tips:
- Fingers shrink slightly when cold.
- For accuracy:
- Measure at room temperature, late afternoon.
- If your knuckle is wider than the base, size up 0.5-1.
Chains & Necklaces Size Guide
Chains & Necklaces Size Chart:
| Length (cm) | US Size (inches) | EU Size (cm) |
|---|---|---|
| 45 | 18 | 45 |
| 50 | 20 | 50 |
| 55 | 22 | 55 |
| 60 | 24 | 60 |
Style Recommendations:
- 45–50 cm (18–20"): Ideal for collarbone-length pendants.
- 55–60 cm (22–24"): Perfect for layering or statement pieces.
Pendants Size Suggestion
Pendant Size Chart:
| Pendant Size (cm) | Chain Length (cm) |
|---|---|
| ≤1.5 | 45–50 |
| 1.5–3 | 50–55 |
| ≥3 | 55–60 |
Note:
- Larger pendants require thicker chains (≥3mm) for balance.
General Notes
To help you choose the most suitable chain length, we provide standard measurement recommendations for bracelets, rings and chains.
Your ideal length should be selected based on personal preference, wrist size, and styling needs.
- Hypoallergenic: All jewelry uses 925 Sterling Silver with anti-tarnish coating.
- Need Help? Email service@ideagemer.com with a photo of your measurement tape for instant guidance.
Design Concept · Armor Collection
The Versatile Black Onyx Armor Stud Earrings feel like miniature shields pressed close to the skin. Polished black onyx sits within geometric sterling silver frames, each edge beveled and angled to catch subtle light, creating a tension between shadow and shine. The studs hug the earlobe with a sense of structural weight, suggesting strength without bulk.
Part of the signature Armor Series, these men’s earrings combine defensive architecture with refined detail, offering bold, tactile presence. Their clean lines and gemstone focus naturally align with searches for black onyx stud earrings, men’s armor-inspired jewelry, and high-impact silver accessories.
Product Details
Metal Material: Sterling Silver
Metal Finished: White Gold Vermeil
Stone Material: Black Agate
Stone Color: Black
Weight: 2.6g/Pair
Earring Size:
Height: 11.18mm
Width: 11mm
Shipping Box*1
Gift Bag*1
Jewel Box*1
Dustproof Bag*1
Polishing Cloth*1

Crafted from Brass, Sterling silver, or Gold, this piece is designed for long-term durability and everyday wear.
Our silver product are all nickel-free and skin-safe, ensuring comfortable, hypoallergenic use. Each product is individually finished to achieve depth, texture, and a refined masculine edge.
Designed in New York. Responsibly crafted by our dedicated workshop partners.
For the best fit, measure your wrist snugly using a soft measuring tape.
Add 0.5–1 inch (1–2.5 cm) for a comfortable fit, depending on your preference.
If you are between sizes, we recommend sizing up for a more relaxed feel.
Need detailed guidance?
View our complete Size Guide here: SIZE GUIDE
Every IDEAGEMER order is carefully prepared and quality-inspected before dispatch.
Processing Time
• Ready-to-ship pieces: 1–3 business days
• Made-to-order designs: 2–3 weeks
• Custom or engraved pieces: 4–6 weeks
Estimated Delivery
• United States: 6–10 business days
• UK & Europe: 7–12 business days
• International: 8–15 business days
Once shipped, you will receive a confirmation email with tracking details. Please allow 24–48 hours for tracking updates to appear.
Shipping rates and expedited options are available at checkout.
Crafted from recyclable sterling silver & brass.
Plastic-free recyclable packaging.
Ethical production standards.
