
Share anything you’re eyeing, from any store or app. Ryn tells you your size, how it will fit your body, and when there’s a better choice.
How it works
On any store’s website or app, Instagram, Pinterest, or a link a friend sends you.
No copying links, no new store to learn. Ryn reads the page, the size chart and the reviews.
Your size, how it will fit your body, the fabric and the value, and a better option when there is one.

What Ryn tells you
Lovely, but size down.
It runs big through the shoulder. In your usual M it would swamp you; the S sits where your shoulder ends and still closes over a sweater.
Like a friend with a fashion editor’s eye: warm, certain and specific about cut and cloth. Ryn never tells you not to buy something you love. It tells you the size that will work, and when there’s a better choice for your body.
Our approach
Ryn matches your measurements to each store’s own size chart, every time.
Ryn keeps to what feels like you, and finds better fabric and better fit within it.
Fibre, weight and price, in plain words. Ryn may earn a commission; it never changes what Ryn says.
Your measurements are only ever used for your checks, and you can delete your account any time.
On your phone
Free while Ryn is new. Check as many as you like, and keep the ones you love.
Coming soon to the App Store
On your laptop · Coming soon
A small Ryn button on any product page. Tap it for your size and how it will fit, without leaving the store.