knowhersize
Find a size

Her size card

Her bra, ring, dress, top and shoe sizes in one place, ready for the next birthday, Christmas or anniversary. The card stays in this browser. Nothing is sent to us.

Reviewed · How we work

Her sizes

BraFind her bra size
T-shirts, robes, pyjamas
US sizes
US women’s
US sizes
Colours, brands, what she already has. Stays on this phone, never in links.

Start with her bra size, then add the rest as you find them.

  • Stays here. Saved in this browser, not on our server.
  • Shares quietly. The link carries sizes after the # sign, never your notes.
  • Converts. Switch US, UK, AU or EU and every size follows.

How to fill it in without asking

  • Bra: read the tag on a bra she likes, or use her clothes size for a range. The bra size calculator adds the result to this card in one tap. Reading her bra tag shows where to look.
  • Top and dress: check the labels on a top and a dress she wears a lot. Robes, pyjamas and bralettes go by her top size.
  • Shoes: look inside a pair she wears often; the size is printed on the insole or the tongue.
  • Ring: borrow a ring she wears on the same finger and compare it with a ring size chart at a jeweller. Ring sizes differ from finger to finger.

Why keep a card

Most gift mistakes are size mistakes. Once the sizes are written down, Christmas, a birthday or an anniversary takes minutes instead of guesswork. For gifts at Christmas, see getting her size right for a Christmas lingerie gift; when you have no size at all, try the gifts that don’t need an exact size.

The card follows the same privacy rule as the calculator: it is kept in your browser, and a shared link carries the sizes after the # sign, which browsers don’t send to websites.

Questions about the card

Where is the card saved?

Only in this browser on this phone or computer. We never receive it. Clearing your browser data or using a private window removes it, so copy the link if you want a backup.

What does the shared link contain?

Her sizes, written after the # sign in the address. Browsers never send that part to a website, and the page removes it from the address before analytics or ads load, so the sizes don't reach our server. Your notes are never put in the link. Anyone you send the link to can read the sizes.

Can I keep a card for myself?

Yes. It works the same way: add your bra size from the calculator, then your other sizes, and copy the link to send it to whoever buys your gifts.

Are the ring and shoe conversions exact?

They're the standard conversions, but brands vary by about half a size. For rings, a jeweller can usually resize by a size or two, so buy from one that offers it.