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What Tablif read on RingSizeCharts's site

RingSizeCharts describes itself as: “Free Ring Size Calculator & International Size Chart (mm/inches) · RingSizeCharts”

Price model: Monthly · free tier
Free tier: Free forever
Stage: Live, no waitlist
How it differs: “it follows ISO 8653:2016, converts both ways, adds a full half-size chart plus guides on temperature and band width, and runs entirely in your browser - no install, no account, nothing uploaded.”

Where it puts itself

Rules out “install”.

Says it will not: install

“What's different: it follows ISO 8653:2016, converts both ways, adds a full half-size chart plus guides on temperature and band width, and runs entirely in your browser - no install, no account, nothing uploaded.”

“Nothing to install”

What it costs

Monthly subscription. A free tier, free forever. Trial: “14-day”. Sales on request. Prices quoted: $0 /mo, $29 /mo, $9 /mo.

Monthly: yes
Free plan: free forever
Price: $0 /mo · $29 /mo · $9 /mo
Trial: 14-day
Contact sales: yes

“Free $0 /mo”

“White-label Pro $29 /mo”

“Store $9 /mo”

Who it sells to

Sells to consumers. In nine languages.

Sells to: consumers
Languages: nine languages

“Free ring size calculator with international size conversions.”

“Free, nine languages, six ring styles.”

How it runs

A mobile app. Runs locally and works offline. No API.

Kind: mobile
Runs where: on the device, offline
API: no

“Free · No sign-up · Works on mobile”

“…runs entirely in your browser - no install, no account, nothing uploaded.”

What it offers as proof

Live, no waitlist. Try it without signing up. Publishes a blog.

Instant signup: yes
Trial asks for: nothing

“Create your account”

“Free · No sign-up · Works on mobile”

Sources

Tablif read these pages, last on 16 Oct 2026. Everything above is what the product says about itself; Tablif does not verify every claim.

RingSizeCharts · Office #42,581