Size Guide-
All Zostma rings are listed in US sizes. Find your size in the table below, or use the dropdown to compare with your local sizing system.
| US size | Diameter (mm) | Circumference (mm) | AU / UK / Ireland |
|---|
To find your size, wrap a thin strip of paper snugly around the base of the finger you plan to wear the ring on — making sure it can still slide over your knuckle — and mark where it meets itself. Measure that length in millimetres to get your circumference, then match it to the table above. If you already own a ring that fits well, simply measure the inside diameter straight across and find it in the table. We always recommend measuring at the end of the day when fingers tend to be at their largest, and if you find yourself between two sizes, go up rather than down for a more comfortable wear.
Stacking rings? Consider sizing up by half a size on the finger you plan to stack, so the pieces sit comfortably together without feeling tight.
Zostma bracelets are available in set lengths. Use the table below to find the fit that suits you best.
| Bracelet length | Wrist circumference | Fit |
|---|---|---|
| 17 cm | 14 – 15 cm | Snug |
| 18 cm | 15 – 16 cm | Classic |
| 19 cm | 16 – 17 cm | Relaxed |
| 20 cm | 17 – 18 cm | Loose |
To measure your wrist, wrap a strip of paper or a piece of string just below your wrist bone — where you would naturally wear a bracelet — and mark where it meets itself. Measure that length in centimetres. From there, add 2–3 cm for a close, classic fit, or 3–4 cm if you prefer your bracelet to sit a little looser or plan to layer.
Layering bracelets? Go up one size so your pieces sit comfortably together without feeling tight against the wrist.
Use the table below to understand where each chain length will sit on the body. Keep in mind that pendants will hang a little lower than the chain length itself.
| Length | Inches | Where it sits |
|---|---|---|
| 35 – 40 cm | 14 – 16" | Choker — at the collarbone |
| 42 – 45 cm | 16 – 18" | Princess — just below the collarbone |
| 48 – 50 cm | 19 – 20" | Matinee — on the chest |
| 55 – 60 cm | 22 – 24" | Opera — mid-chest to sternum |
| 70 – 90 cm | 28 – 36" | Rope — below the bust |
The easiest way to visualise a length before buying is to cut a piece of string to the exact measurement and hold it around your neck. What you see in the mirror is exactly where your Zostma necklace will fall. Body proportions vary, so this simple step takes the guesswork out entirely — especially useful when you are deciding between two lengths.
Layering necklaces? Choose lengths that differ by at least 5–7 cm so each piece has room to sit distinctly. A classic starting point is a 40 cm choker paired with a 45 cm princess and a 55 cm matinee.