SearchFrostine Lab-Grown Diamond Engagement Ring, Platinum, 2.50 s ct center
The store's own photos of item 71834. Tap a picture to zoom.
Which size?
Find your ring size in a minute
Your screen becomes the sizer. On most phones it is already true size, and a quarter lets you check. Then measure the finger you will wear the ring on, with a ring that already fits that finger or with a strip of paper.
1. Check the screen with a quarter
Lay a quarter flat on the screen, over the coin, and move the slider until the coin on the screen is exactly the size of yours. No quarter? Then the circle and the ruler are not to scale: measure your paper strip with a real ruler and set that number in millimeters on the strip slider, then send it to the desk.
2. Measure
Take a ring that fits the same finger of the same hand the new ring will live on; every finger is its own size. Set it on the screen over the circle and move the slider until the circle just fills the inside of the ring.
Size 7, 17.3 mm inside
Wrap a strip of paper snug around the base of the finger, where the ring sits, and mark where it meets. If your knuckle is bigger, wrap it there too and take a size between the two, nearer the knuckle. Lay the strip along the ruler's right edge from the 0. Move the slider until the gold line sits on your mark.
54.5 mm around is size 7
Size 7: 17.3 mm across, 54.4 mm around. It is the most bought size here: 21 percent of the engagement rings sold here in the past year with a size recorded. 159 of the 174 rings here list size 7.
The engagement ring size chart, 4 to 16
| US size | Inside diameter | Around the finger | Rings here listing it |
|---|---|---|---|
| 4 | 14.9 mm | 46.8 mm | 73 |
| 4.5 | 15.3 mm | 48.0 mm | 77 |
| 5 | 15.7 mm | 49.3 mm | 158 |
| 5.5 | 16.1 mm | 50.6 mm | 158 |
| 6 | 16.5 mm | 51.9 mm | 163 |
| 6.5 | 16.9 mm | 53.1 mm | 163 |
| 7 | 17.3 mm | 54.4 mm | 159 |
| 7.5 | 17.7 mm | 55.7 mm | 154 |
| 8 | 18.1 mm | 57.0 mm | 152 |
| 8.5 | 18.5 mm | 58.2 mm | 111 |
| 9 | 18.9 mm | 59.5 mm | 101 |
| 9.5 | 19.4 mm | 60.8 mm | 20 |
| 10 | 19.8 mm | 62.1 mm | 18 |
| 10.5 | 20.2 mm | 63.3 mm | 1 |
| 11 | 20.6 mm | 64.6 mm | 1 |
| 11.5 | 21.0 mm | 65.9 mm | 0 |
| 12 | 21.4 mm | 67.2 mm | 0 |
| 12.5 | 21.8 mm | 68.5 mm | 0 |
| 13 | 22.2 mm | 69.7 mm | 0 |
| 13.5 | 22.6 mm | 71.0 mm | 0 |
| 14 | 23.0 mm | 72.3 mm | 0 |
| 14.5 | 23.4 mm | 73.6 mm | 0 |
| 15 | 23.8 mm | 74.8 mm | 0 |
| 15.5 | 24.2 mm | 76.1 mm | 0 |
| 16 | 24.6 mm | 77.4 mm | 0 |
A screen measurement checked with a quarter is a guide, good to about a half size; the desk sizes you right the first time. "Rings here listing it" counts the live listings on October 2, 2026; the sales lines are engagement rings sold here in the year to September 26, 2026, with a size recorded.
Description
Frostine is a platinum engagement ring with a 2.50 carat lab-grown oval at its center, F color and VVS2 clarity, and 0.20 carats of lab-grown round side diamonds. The band is 2 mm wide, and the ring weighs 5.00 grams.
Platinum is white all the way through, so it never needs replating to stay white. Sizes run from 5 to 9 with half sizes. Pay in full at a secure checkout, or over time with Affirm if you qualify.
The center stone, life size
Drawn to scale with the quarter.
Hold a real quarter flat on your screen, over the coin. Tap Smaller or Bigger until the coin on the screen matches it.
- Carat
- Cut
- Length
- Width
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