IVIAPRO · Size Guide
Everything we sell is measured on the finished piece, so you can compare our numbers with a piece you already own. Below are ring sizes in four systems, slip-on bangle diameters, bracelet lengths from newborn to men's, and necklace chain lengths with a chart showing where each one falls.
You do not need a ring sizer. A ruler, a strip of paper and a soft tape measure are enough — four minutes, one measurement per category.
Put a ring that already fits on a ruler and read the widest inner span in mm — the band thickness does not count. No ring to hand? Wrap paper around the base of your finger, mark where the paper meets, and measure that length: that is your inner circumference.
A bangle has to pass over your knuckles, not your wrist. Tuck your thumb in and measure across the widest part of your hand, from the index knuckle to the little-finger knuckle. Match that figure to the circumference column below.
Measure your wrist snugly with a soft tape, then add about 1 cm (0.4 in) for a comfortable fit. Add a little more if you like a loose drape, a charm drop, or you plan to stack bracelets.
Lay a chain you already wear flat and measure its full length, clasp to clasp. Compare it with the length chart below and you will know where a new piece will sit on you.
Our rings are graded on inner diameter. The four systems below grade differently, so the same finger can carry four different numbers — if you already know the diameter in mm, use that and skip the rest.
| HK Ring Size | Euro Ring Size | US Ring Size | UK Ring Size | ||||
|---|---|---|---|---|---|---|---|
| Size # | Inside Diameter (mm) | Size # | Inside Diameter (mm) | Size # | Inside Diameter (mm) | Size # | Inside Diameter (mm) |
| 1 | 12.40 | 41 | 13.00 | 0 | 11.65 | A | 12.00 |
| 2 | 12.80 | 42 | 13.35 | 0.5 | 12.05 | B | 12.40 |
| 3 | 13.10 | 43 | 13.65 | 1 | 12.45 | C | 12.80 |
| 4 | 13.50 | 44 | 14.00 | 1.5 | 12.85 | D | 13.20 |
| 5 | 13.80 | 45 | 14.30 | 2 | 13.25 | E | 13.60 |
| 6 | 14.50 | 46 | 14.60 | 2.5 | 13.65 | F | 14.40 |
| 7 | 14.50 | 47 | 14.95 | 3 | 14.10 | G | 14.40 |
| 8 | 14.80 | 48 | 15.25 | 3.5 | 14.50 | H | 15.20 |
| 9 | 15.20 | 49 | 15.60 | 4 | 14.90 | I | 15.60 |
| 10 | 15.60 | 50 | 15.90 | 4.5 | 15.35 | J | 15.60 |
| 11 | 15.90 | 51 | 16.25 | 6 | 15.75 | K | 16.00 |
| 12 | 16.30 | 52 | 16.55 | 5.5 | 16.20 | L | 16.40 |
| 13 | 16.30 | 53 | 16.55 | 6 | 16.55 | M | 16.80 |
| 14 | 17.00 | 54 | 17.20 | 6.5 | 17.00 | N | 17.20 |
| 15 | 17.30 | 55 | 17.55 | 7 | 17.40 | N | 17.60 |
| 16 | 17.65 | 56 | 17.80 | 7.5 | 17.80 | P | 18.00 |
| 17 | 18.00 | 57 | 18.15 | 8 | 18.20 | Q | 18.40 |
| 18 | 18.35 | 58 | 18.50 | 8.5 | 18.60 | R | 18.80 |
| 19 | 19.70 | 59 | 18.80 | 9 | 19.00 | S | 19.20 |
| 20 | 19.05 | 60 | 19.10 | 9.5 | 19.40 | T | 19.60 |
| 21 | 19.40 | 61 | 19.40 | 10 | 19.85 | U | 20.40 |
| 22 | 19.75 | 62 | 19.75 | 10.5 | 20.65 | W | 20.40 |
| 23 | 20.10 | 63 | 20.05 | 11 | 20.65 | W | 20.80 |
| 24 | 20.45 | 64 | 20.40 | 11.5 | 21.05 | X | 21.20 |
| 25 | 20.80 | 65 | 20.70 | 12 | 21.45 | Y | 21.60 |
| 26 | 21.15 | 66 | 21.05 | 12.5 | 21.85 | Z | 22.00 |
| 27 | 21.45 | 67 | 21.35 | 13 | 22.25 | ||
| 28 | 21.80 | 68 | 21.70 | ||||
| 29 | 22.15 | 69 | 22.00 | ||||
| 30 | 22.45 | 70 | 22.30 | ||||
| 31 | 22.80 | 71 | 22.60 | ||||
| 32 | 23.15 | 72 | 22.90 | ||||
| 33 | 23.50 | 73 | 23.25 | ||||
Between two sizes? Take the larger one — a ring that spins is easier to live with than one that pinches. Where two sizes in the same system show the same inside diameter, either one fits the same finger.
Bangles do not open, so the figure that decides the fit is the diameter of the opening and the circumference it creates. Petite is the smallest opening we make; XX-Large is the largest.
| Bangle | Length | |||||
|---|---|---|---|---|---|---|
| Diameter | Circumference | |||||
| Size | In inch | In cm | In mm | In inch | In cm | In mm |
| Petite | up to 2.12 | up to 5.4 | up to 54 | up to 6.65 | up to 16.9 | up to 169 |
| Small | 2.25 | 5.7 | 57 | 7 | 17.8 | 178 |
| Medium | 2.37 | 6 | 60 | 7.5 | 19 | 190 |
| Medium Plus | 2.5 | 6.35 | 63.5 | 7.85 | 20 | 200 |
| Large | 2.62 | 6.65 | 66.5 | 8.25 | 21 | 210 |
| x-Large | 2.75 | 7 | 70 | 8.65 | 22 | 220 |
| xx-Large | 2.87 | 7.3 | 73 | 9 | 22.85 | 228.5 |
Measure your hand, not your wrist. If your knuckle span lands between two bangle sizes, choose the size whose circumference is closest to your hand measurement — bangles cannot be adjusted later.
Bracelet lengths are measured end to end, clasp included. Children's sizes are listed by age as a guide only — wrists vary, so measure when you can.
| Size / Category | Inches |
|---|---|
| Newborn | 4" |
| 3-6 months | 4.5" |
| 6-12 months | 4.75" |
| 18-24 months | 5" |
| 2 yrs | 5.5" |
| 3 yrs | 5.75" |
| 4-5 yrs | 6" |
| 6-7 yrs | 6.5" |
| 8-12 yrs | 7" |
| Ladies Small | 7" |
| Ladies Med/sma | 7.25" |
| Ladies Medium | 7.5" |
| Ladies Med/large | 7.75" |
| Ladies Large | 8" |
| Mens | 8-9" |
One length, two labels. 8-12 yrs and Ladies Small are both 7" (17.8 cm), so a children's size can suit a small adult wrist. If you are ordering for a gift, the wrist measurement matters more than the age bracket.
Necklace length is the total length of the chain, end to end, measured with the chain laid flat. The chart below shows each length in inches and centimetres; the picture after it shows where every length sits on the body.
| Inch | cm |
|---|---|
| 14" | 36 cm |
| 16" | 40 cm |
| 18" | 46 cm |
| 20" | 50 cm |
| 24" | 60 cm |
| 28" | 70 cm |
| 30" | 76 cm |
| 33" | 83 cm |
| 37" | 95 cm |
| 39" | 100 cm |
Extension chains are additional. Some of our styles ship with a 5 cm (2 in) extender. The chart shows the chain length before the extender, so the longest wearable length is the two added together.
Two ways, both reliable. Fastest: take a ring that fits you well, lay it on a ruler and read the widest inner span in mm — that is your inner diameter, and it matches the Inside Diameter column of the ring table above.
If you have no ring to hand: wrap a strip of paper around the base of the finger, mark where it meets, and measure the length in mm. That is your inner circumference; divide by 3.14 for the diameter.
Go up a size for rings and bangles. A ring that is slightly loose still sits correctly with the knuckle holding it, while a tight ring is uncomfortable on warm days or after salt and water. For bracelets the same logic applies to length: add 0.5 cm more than your snug wrist measurement rather than less.
Use the one you already wear, and ignore the other three. Our table lists each system against its own inside diameter, because the systems grade slightly differently and a straight conversion can land you a half size out. If you only know your diameter in mm, that number is the one that never changes between systems.
No. The length in the chart is the chain itself, measured end to end. Where a style includes an extender, the product page lists it separately — for example a 45 cm chain with a 5 cm extender gives a 50 cm maximum.
Yes. Sizes can be mixed within an order. For a size run, a boutique opening order or a private-label production run, send us the style, the size breakdown and the quantity you have in mind and we will come back with availability and lead time.
Tell us the style, the size run and the quantity — we will confirm what is in stock, what can be made, and how long it takes.
Contact IVIAPROWholesale, dropshipping and custom orders welcome.
