Free instant size converters for fashion, jewelry, bikes, helmets, wetsuits, bedding, and more — across US, UK, EU and international sizing standards with no signup.
Hey Product Hunt 👋
Every time I shopped internationally — or helped a client's ecommerce store deal with size confusion — I ran into the same mess: US vs UK vs EU sizing, different scales for shoes, rings, bike frames, helmets, even bedding. Most converters online only cover clothing and shoes, so anything else meant digging through forums.
Size Convertly brings all of that into one place: instant conversions across fashion, jewelry, sports gear, and home goods, mapped across US, UK, EU, and other international standards. No signup, no ads blocking the result — just enter a size and get your match.
This is part of a small family of free tool sites I'm building (EasyPDFNex, Easy Calculator Nex) — same idea each time: solve one annoying problem really well, keep it fast and free.
Curious — what's a sizing conversion that's always been a pain for you?
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Finally a no-signup converter that actually has bike and helmet sizes covered, which is kind of rare honestly. The jewelry ring size chart especially came in handy for a recent gift.
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finally a no-fuss size converter that actually covers helmets and wetsuits alongside the usual stuff. tried the bike frame one and it nailed the conversion between EU and US sizing.
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Finally a size converter that handles wetsuits and helmets, not just shoes. Tried the bike frame one and it matched what my local shop told me, took like two seconds.
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Love how quick and no-fuss this is, especially for jewelry sizing where I always second-guess myself. One thing that would make it even better: adding a visual reference like a finger or ring chart next to the size numbers, since half the time I just need a picture to feel confident about which size to actually pick.
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Finally a no-signup converter that actually has bike and helmet sizes covered, which is kind of rare honestly. The jewelry ring size chart especially came in handy for a recent gift.
finally a no-fuss size converter that actually covers helmets and wetsuits alongside the usual stuff. tried the bike frame one and it nailed the conversion between EU and US sizing.
Finally a size converter that handles wetsuits and helmets, not just shoes. Tried the bike frame one and it matched what my local shop told me, took like two seconds.
Love how quick and no-fuss this is, especially for jewelry sizing where I always second-guess myself. One thing that would make it even better: adding a visual reference like a finger or ring chart next to the size numbers, since half the time I just need a picture to feel confident about which size to actually pick.