
Sizes: Shoe Size Converter
All charts, rings & clothes
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Free
In-App Purchases
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About
Your size, on every scale in the world — and what it becomes at each brand.
A US 9 is a UK 8, an EU 42 and 26.7 cm. Sizes gives you the whole row at once, so you can read off whichever number the shop in front of you is asking for.
FREE, FOREVER
• Convert any size, any scale, any category — shoes, rings, clothes, hats
• Men's, women's and kids' scales, which genuinely differ
• US, UK, EU, JP, CM, AU, IND, FR and IT
• No account, no sign-up, nothing to read first
WHY THE NUMBER IS RIGHT
Every size is derived from the measurement it describes — the shoe last, the ring's circumference — never copied off a brand's chart. Brands round to their own house conventions, so a printed label can sit half a size away from the standard. Sizes tells you when that happens instead of pretending it doesn't.
MEASURE YOUR FOOT WITH THE CAMERA
Photograph your foot and read every scale at once. It is measured on your iPhone, and the tolerance is shown next to the reading rather than hidden — a figure without a tolerance invites more trust than it has earned.
SIZES PRO
• Every size saved, in every category, for as many people as you like
• Brand fit: how each brand actually runs on you, not on its size chart
• The shelf: every pair you own, with photos
• More than one person — a partner, the children
• Widget and Siri shortcuts
BUILT LIKE AN INSTRUMENT
Monospaced figures on a near-black panel, and nothing that isn't a measurement. Most size converters look like calculators from 2015. This one doesn't.
PRIVATE BY CONSTRUCTION
No account and no server. Your sizes and your photographs are written to this iPhone and stay there. Photographs are measured on the device and never uploaded anywhere.
Terms of Use: https://studiovolta.space/terms
Privacy Policy: https://studiovolta.space/sizes/privacy
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What's New in Sizes
1.0.1
September 8, 2026
A small correction under the hood. Nothing changes on screen.
Subscription plans
Sizes Pro Weekly
Every size, every brand, measured on you.
$3.997 Days
1
In-App Purchases
$34.99
Sizes Pro Lifetime
Every size, every brand, measured on you.



