How to Buy an Engagement Ring Without Her Knowing

Buying an engagement ring as a complete surprise is one of the most romantic things you can do — and one of the most logistically tricky. Between getting the ring size right, managing deliveries, hiding bank statements, and actually pulling off the proposal, there's a lot to navigate. Here's how to do it smoothly.

Step 1: Get Her Ring Size (Without Asking)

This is the hardest part for most people. A few approaches that work:

Borrow a ring she wears on her ring finger. Take it to a jeweller to be measured, or trace the inside circumference on paper. Make sure you borrow one she wears on the correct finger — people often wear rings on different fingers in different sizes.

Ask a close friend or family member. If she's close to her mother, sister, or best friend, they may already know — or can find out subtly.

Use a sizing guide while she sleeps. There are printable ring sizer tools (available on our ring size guide) that you can place next to a ring she owns to estimate the size. Not foolproof, but it gets you in the right ballpark.

If you genuinely can't get the size: the Australian average ring size is around a size N (US 7). Buying slightly larger is preferable to smaller — rings are easier to size down than up.

Step 2: Manage the Finances Quietly

If you share a bank account, a sudden large transaction will likely be noticed. Options: use a separate personal account, use a credit card she doesn't have visibility into, or pay in instalments over time. Most jewellers — including us — are happy to discuss payment flexibility.

Step 3: Manage the Delivery

If you're ordering online, ship to your workplace or a trusted family member's address. Make sure you're home or available to intercept the delivery if sending to your home address. Most jewellers use discreet, unmarked packaging.

Step 4: Hide the Ring

Classic spots: inside a jacket pocket, inside a shoe in the back of the wardrobe, at a family member's place. Avoid jewellery boxes — she'll spot the distinctive shape immediately. Use a plain box or bag nested inside something unrelated.

Step 5: The Proposal Itself

All of that effort — and the proposal lasts 30 seconds. Make those seconds count. Our full proposal planning guide covers timing, location, and making it memorable.

When you're ready to start browsing, our engagement ring collection is a great place to begin — and every ring is made to order, so you have time to plan properly.

Find Her Ring at Una Diamond

Not sure where to start? Our most popular styles are a safe bet — and every ring can be resized after the proposal:

• The Georgina — oval-cut solitaire (universally flattering)
• The Nova — toi et moi for something unique
• Solitaire rings
• Oval cut rings
• Browse all ready-to-ship rings →