Online ring sizer
Helps users estimate ring size by ring or by finger directly on screen and reduces uncertainty before buying.
Ring Size
Finding the right ring size should feel simple
Ring Size helps people measure ring size at home with less guesswork, clearer guidance, and a calmer buying experience.
Why we built it
A personal problem that turned into a useful product
The project started with a very practical problem: choosing the correct ring size is harder than it seems. Even half a size can affect comfort, while common advice is often vague or inconvenient.
It began with personal experience. I love jewelry, especially rings, but finger size can change, and I often had to recheck my own size. It turned out many other people face the same issue: some shop for themselves, some need a gift size, and some simply do not know where to start.
That is why we created Ring Size: a site that helps people measure ring size online, understand international sizing, and get clear answers to common questions without unnecessary stress.
What already exists
The project has grown from an idea into a working product
Conversion chart
Brings RU, US, UK, EU, and other common standards together in one place.
Tips and answers
Offers practical explanations about how to measure more accurately and what to do in edge cases.
Multilingual experience
The site already works in Russian, English, and Arabic.
API
We are already building API capabilities for integrations, services, and product workflows around ring sizing.
Continuous improvement
We keep improving measurement quality, content structure, and usability across the site.
Who it helps
Ring Size is useful for buyers and product teams alike
For shoppers
If you are choosing a ring for yourself and want a faster way to estimate the right size.
For gifts and proposals
If you need to size more discreetly and reduce the risk of getting it wrong.
For stores and developers
If you want to use Ring Size data and tools inside your own products and integrations.
Where the project is going
Ring Size is becoming more than a website
Today Ring Size is no longer just a sizing tool and a content site. We are building API-powered product flows that stores, services, and apps can use in their own experiences.
We want the project to be valuable both for people choosing a ring and for teams that want to build ring sizing into their products.
Go to API Size lookup and conversion v1
Camera calibration and measurement v2
Interactive documentation live
What comes next
We are building Ring Size into a more useful and precise assistant
- improve sizing accuracy and decision logic
- expand the API and its documentation
- build stronger answer pages and practical content
- improve localization and user experience across languages
- make ring sizing easier and more understandable overall