Short answer: borrow a ring she already wears and measure the inside diameter with a ruler. If that is impossible, buy Indian size 17, or choose an open ring that adjusts. Both are safer than guessing small.
Method one: measure a ring she owns
The most reliable route, because you are measuring an object rather than a moving finger.
- Take a ring she wears on the finger you are buying for. Not one she wears elsewhere, because sizes differ across the hand.
- Lay it flat and hold a ruler across the inside, edge to edge, through the widest point.
- Read it in millimetres. Indian 16 is 18.1 mm, 17 is 18.5 mm, 18 is 18.9 mm, 19 is 19.3 mm.
Put it back before it is missed. The whole thing takes under a minute.
Method two: trace the inside
If you cannot take the ring out of the house, stand it on paper and draw around the inside edge with a sharp pencil. Measure the circle later. Slightly less accurate, entirely undetectable.
Method three: ask someone who already knows
A sister, a close friend or her mother very often knows, and asking them is far less obvious than asking her. It also gets you a second opinion on the style, which is usually the harder half of the decision.
Method four: choose a shape that forgives
The most reliable way to survive a wrong guess is to buy something that does not depend on being exact.
An open ring has a gap across the top and a little give, so it works across roughly a size either way. It is the single safest ring to gift blind.
Very slim bands are also more forgiving than wide ones. A fine band that is marginally loose still sits fine, while a wide band the same amount loose spins constantly.
Which size if you truly have to guess?
Indian size 17 for an index or middle finger. It is the middle of the four sizes we stock and the most commonly bought.
If you are torn between two, always take the larger. A ring has to pass the knuckle, which is wider than the base of the finger, and fingers swell through the day. Slightly loose is wearable. Slightly tight is not.
What to buy if you want to avoid sizing entirely
A pendant or earrings have no size at all. The cherry charm pendant at ₹599 and the bow studs at ₹349 both work as gifts without a single measurement.
If the ring itself is the point, an open ring plus the 2-day returns window is a perfectly reasonable amount of risk.
Making it a gift that lands
Pick the shape to her taste rather than yours. If she wears nothing but plain jewellery, a plain infinity band at ₹399 will get worn. Something ornate will sit in a drawer however well it fits.
Browse the full ring range, all in sizes 16 to 19.
Frequently asked questions
How can I find out her ring size secretly?
Borrow a ring she already wears on the right finger and measure straight across the inside with a ruler. That figure in millimetres is the inside diameter. Indian size 16 is about 18.1 mm and each size up adds roughly 0.4 mm.
What ring size should I buy if I have to guess?
Indian size 17 for an index or middle finger is the most common for adult women, and it is the middle of the range we stock. If you are choosing between two sizes, take the larger one, because a ring has to clear the knuckle.
What if the ring does not fit?
Choose an open ring, which has give across the top and adjusts about a size either way. Failing that, our returns window is 2 days from delivery, so an exchange is straightforward while the piece is unworn and in its original packaging.
