Find your ring size at home, and get it right
Print a sizer that is true to scale, with a ruler and a card check built into the sheet so a bad print cannot fool you. Or skip printing: type a measurement and read the US size below.
Quick converter
Already wrapped a strip or measured a ring? Enter the millimeters.
For the full sizer with wrap strip and ring circles, print the PDF.
Three ways to size, one accurate answer
Measure your finger
Wrap the printed strip, or a slip of paper, around the base of your finger and read the size at the slot.
How to measureUse a ring you own
Lay a ring that already fits over the printed circles and match the inside edge to its size.
Open the sizerSize a gift secretly
Planning a proposal? Borrow a ring they wear, or measure a finger while they sleep, without spoiling the surprise.
Secret sizingThe scale check is the whole point
A printable ring sizer is only as good as the print. Send the page to a printer with the default settings and it usually shrinks a few percent to clear the margins. A few percent on a 17 mm circle is most of a ring size. That is why so many home measurements come back too small.
Every True Size Ring sheet carries its own proof of scale: a 50 mm ruler and an outline sized to a standard bank card, 85.6 by 54 mm. Print, then check. If the ruler reads 50 mm and a card fills the box, the circles are true and you can trust the size. If not, reprint at 100%. It takes ten seconds and it is the difference between a ring that fits and one that does not.
Frequently asked questions
How do I find my ring size at home?
Print the ring sizer at 100% scale, confirm the scale with the 50 mm ruler or a bank card, then wrap the strip around your finger or lay a ring you own over the circles. If you have already measured, the converter turns your millimeter measurement into a US size right on the page.
Why do printed ring sizers often give the wrong size?
Most printers shrink a page to fit the margins unless you tell them not to. A shrunk sizer reads small, so people order a ring that is too tight. True Size Ring puts a ruler and a credit-card box on the sheet so you catch a bad print before you measure.
Is it really free?
Yes. There is no signup and no account. The PDF builds in your browser, and nothing you type is sent anywhere.
What if I am between two sizes?
Pick the larger one, especially for a wide band, since a ring has to slide over the knuckle. If it is close, a jeweler can size most rings up or down by a half size.