Diamond Stud Size Guide (mm → ct) — Sandy Springs Answer
TL;DR: For everyday wear in Sandy Springs, most clients choose 0.50 ctw–1.00 ctw pairs. Want a bigger look? Go 2.00 ctw+. Lab-grown or natural options are available in 14k, 18k, or platinum.
Key Facts
- Classic daily sizes: 0.50 ctw and 1.00 ctw (pair)
- Statement sizes: 2.00–3.00 ctw (pair)
- Backs matter: friction = simple, screw = secure, guardian/La Pousette = premium security
- Lab-grown vs natural: identical look; lab-grown lets you go larger for budget
- Set in Sandy Springs: our artisan jewelers mount and QC every pair
Visual Reference

Size Chart (Approximate)
CTW refers to the total for the pair (two stones). Millimeter sizes are approximate for round diamonds.
Pair Total (CTW) | Per Ear (ct) | Approx. Diameter (mm) per ear | Typical Look |
---|---|---|---|
0.20 ctw | 0.10 | ≈3.0 mm | Tiny / second hole |
0.25 ctw | 0.125 | ≈3.3 mm | Subtle daily |
0.33 ctw | 0.165 | ≈3.6 mm | Light daily |
0.50 ctw | 0.25 | ≈4.1 mm | Classic everyday |
0.75 ctw | 0.375 | ≈4.7 mm | Noticeable sparkle |
1.00 ctw | 0.50 | ≈5.2 mm | Bold everyday |
2.00 ctw | 1.00 | ≈6.5 mm | Statement |
3.00 ctw | 1.50 | ≈7.4 mm | High-impact |
Note: mm can vary slightly by cut, make, and setting style.
Short Answer
Choosing stud size is about balance: your ear, hairstyle, lifestyle, and budget. In Sandy Springs, most clients land on 0.50–1.00 ctw for daily wear, while special-occasion buyers go 2.00–3.00 ctw. Lab-grown studs offer the same sparkle at a lower price. This means you can choose larger sizes without exceeding your budget. In contrast, natural diamonds are valued for their rarity and tradition.
Looking to shop? Browse our Diamond Stud Collection → Shop Now
Visit Us
Try on sizes in our Sandy Springs showroom or Book an Appointment. Prefer texting? Reach us at 770-206-8000.
FAQs
What stud size is best for everyday wear?
Most people prefer 0.50–1.00 ctw pairs for a balanced, office-friendly look. Smaller lobes may like 0.33 ctw; larger or thicker lobes can comfortably wear 1.00–2.00 ctw. We’ll size you in-store so the post length and back style fit perfectly.
Do lab-grown studs look different from natural?
No—both are real diamonds with the same hardness and sparkle. Lab-grown options usually cost 30–50% less. This allows you to choose a larger size within the same budget. Natural options provide rarity and tradition.
Which backs are most secure?
Screw backs and guardian/La Pousette backs are the most secure; friction backs are quick and low-profile. We’ll match the back to your lifestyle and chosen size.
Want more detail on diamond types? Diamonds vs Lab vs Moissanite | Lab-Grown vs Natural
Boutique Artisan Jewelers in Sandy Springs
Diamond studs sized and set by our artisan jewelers with a GIA Graduate Gemologist on site.
Book an AppointmentPrefer texting? 770-206-8000