How to measure your payment ring size: the complete guide
Choosing the right ring size is one of the most important steps when purchasing a payment wearable ring — especially one that’s meant to be used daily for payments. A well-fitting ring not only feels better, but also functions better. That’s why we recommend using our physical ring sizer if you’re unsure about your size or ordering for the first time.
What is a ring sizer?
There are several ways to measure your ring size—using a piece of string to measure your finger’s circumference, comparing an existing ring to a sizing chart, or trying printable guides. However, the most reliable method—and the one we recommend—is the zip-tie style ring sizer. This small, adjustable tool wraps snugly around your finger and gives you an accurate US ring size reading (the same system we use on our website). It’s easy to use, reusable, waste-conscious, and helps you avoid ordering the wrong size.
Alternatively, you can also visit a local jewelry store to have your finger measured precisely. Most jewelers will measure your size quickly and for free—just make sure to ask for your US ring size to match our system.
When should you use a ring sizer?
We recommend using the sizer if:
- You don’t know your ring size.
- You’re buying a ring for a different finger or hand than usual.
- You’ve had sizing issues in the past.
- You’re purchasing a ring as a gift.
- You want the right fit on the first try—no delays or hassle.
- You’d like to avoid return costs.
Step-by-Step: How to use the Astari ring sizer
1. Put it around your finger
Insert the pointed end of the sizer through the small opening to form a loop. Slip the loop over the finger where you intend to wear your ring. Make sure the side with the numbers is facing outward.
2. Adjust the fit
Tighten gently until the sizer feels snug. It should not pinch or leave a mark, but it should feel secure—like a ring that won’t fall off easily.
3. Check the knuckle
When using the sizer, make sure it slides over your knuckle with slight resistance. If it’s tight when going on or off and the size changes as you do, consider sizing up—your ring needs to pass your knuckle comfortably while still fitting securely at the base. A good fit feels snug but not restrictive.
4. Read the size
Look at the number where the arrow points on the outside of the sizer. This is your US ring size.
5. Try again later
Fingers can naturally change size with temperature and time of day—warmer weather or evenings may cause slight swelling, while cold mornings can make your fingers slimmer. For the most accurate sizing, try measuring at different times and temperatures to ensure consistency before ordering.
Sizing Tips
- We do not offer half sizes. If you fall between two sizes, we recommend choosing the larger size for comfort.
- Try the fit multiple times to be sure.
- Measure the correct finger—the same finger on your left and right hand can differ in size, so be sure to size the one you’ll wear the ring on.
Why It Matters
Correct sizing helps you:
- Avoid returns: Fewer shipping cycles, less hassle.
- Save time: No waiting for a new size if the first doesn’t fit.
- Reduce waste: Fewer returns mean fewer shipments, which is better for the environment.
- Get it right the first time: especially with pre-orders and limited-edition rings. Taking a moment to check your size properly means no delays, no guesswork, and no missing out on the ring you really want.
Want to make sure you get the perfect fit? Choose the Ring + Sizer option. Here’s how it works: we’ll first send you our zip-tie style ring sizer—available for all Astari collections—so you can measure your size with confidence. Once you’ve confirmed your size via the link in your email, your ring will ship immediately and you’ll receive a new tracking number. It’s the easiest way to get it right the first time—no stress, no guesswork.
Take the time to measure right — You’ll thank yourself later.
