Proposal Ring: How to Choose One Without Knowing Her Taste

The safest proposal ring, when you don't know her taste, is a round or oval solitaire in white gold or platinum, with a 0.50 to 1 carat diamond. At Laveran Paris, this lab-grown diamond solitaire costs €1,136 to €1,744, and resizing is free for life if you get the size wrong. This guide is for anyone planning a proposal in secret: how to figure out her style, which metal and shape are the safest, how much to budget, how to find her ring size, and what to do if she doesn't love the ring. (We write "her" to keep things simple: this advice applies to anyone who will receive the ring.)

Contents

• Which ring should you propose with if you don't know her taste?
• How can you figure out her style without raising suspicion?
• White, yellow, rose gold or platinum: which metal should you choose?
• Which diamond shape and setting are the safest?
• How much should you spend on a proposal ring?
• How do you find out her ring size without her knowing?
• What if she doesn't like the ring?
• Showroom or video call: how does the appointment work?
• Frequently asked questions

Which ring should you propose with if you don't know her taste?

Choose a solitaire: a single round or oval diamond on a slim white gold or platinum band. It's the style that appeals to the most people, goes with everything, at the office or on a night out, and pairs later with any wedding band. A proposal ring is first and foremost an engagement ring she'll wear every day for years: a well-chosen classic beats a statement piece that may not feel like her.

The more original a piece is, the better you need to know her taste to get it right: a colored stone, a pear or emerald shape are bold choices. With no clues, stick to a timeless base; with a few clues, the sections below will help you read them. For every diamond criterion in detail, see our complete guide to choosing a diamond engagement ring.

How can you figure out her style without raising suspicion?

Her everyday jewelry is your best clue: look at the color of the metal she wears, and whether her pieces are delicate or bold. A few days of quiet observation will tell you most of what you need. Some practical ideas:

• Her jewelry box: which pieces does she actually wear? Discreetly snap a few photos for your appointment.
• Her reactions: a comment in front of a store window, a ring she noticed on a friend's hand. Write them down.
• Her social media: the photos she likes or saves on Instagram or Pinterest often say a lot.
• Her lifestyle: hands-on job, sports, young kids? Go for a low-profile setting with a well-protected diamond.
• An accomplice: a sister or close friend can casually bring up the subject, or confirm a hunch.

Planning a secret proposal? Just bring a few photos of her jewelry: in our 11 showrooms or by video call, an expert will help you turn those clues into a ring. Certified lab-grown diamonds, from €880. Book an appointment →

White, yellow, rose gold or platinum: which metal should you choose?

Go with the metal color she already wears; if in doubt, white gold or platinum are the safest choices. White metals bring out the whiteness of the diamond and go with all her other jewelry, gold or silver.

• 18k white gold: bright and modern, a classic for engagement rings.
• 950 platinum: a dense, precious white metal. At Laveran, platinum costs the same as 18k gold: the metal changes the style, not the budget.
• 18k yellow gold: warm and timeless, ideal if she mostly wears gold jewelry.
• 18k rose gold: softer and more romantic, a good pick if you've already seen her wear it and enjoy it.

Which diamond shape and setting are the safest?

A round diamond is the safest shape, and an oval is the best alternative if she likes modern lines. Round is the most brilliant and most classic cut; an oval elongates the finger and looks larger than a round stone of the same weight. As for the setting, four types of engagement rings cover almost every taste:

If you're torn between two styles, pick the simpler one: an over-designed ring can't be toned down. Other shapes (pear, cushion…) are in our lab-grown diamond engagement ring collection.

How much should you spend on a proposal ring?

Plan on €1,136 to €1,744 for a 0.50 to 1 carat lab-grown diamond solitaire, and from €880 for 0.30 carat. A lab-grown diamond, also called a lab-created or synthetic diamond, is a real diamond: same composition (pure carbon), same hardness (10 on the Mohs scale), same brilliance. It costs up to 80% less than a natural diamond of equivalent quality, so you can get a bigger stone for the same budget. Here are our actual prices as of October 2026:

For a whiter, clearer diamond, the 1 carat Montaigne solitaire is €2,096 in F/VS1 and €2,360 in D/VVS1. All our diamonds are IGI or GIA certified with no fluorescence, and you can pay in installments with Alma.

If you don't know her taste, put your budget into the diamond rather than decorative details: a beautiful 0.70 to 1 carat solitaire always makes an impression.

How do you find out her ring size without her knowing?

Borrow a ring she wears on her ring finger just long enough to have it measured, or trace its inside on a sheet of paper. The inner diameter is all you need to find her size. If she doesn't wear a ring on that finger:

• use a ring she wears on her middle finger and go down about half a size;
• ask a close friend, who may know her size or can get her to try rings on "just for fun";
• request our free ring sizer and discreetly compare it to one of her rings.

No way to be sure? Pick an average size, slightly large rather than too small: the ring needs to slide on during the big moment. At Laveran, resizing is free for life, including after the proposal. Every method for finding a ring size, with or without a sizer: how to measure your ring size.

What if she doesn't like the ring?

You have 30 days to return the ring, and the size can be adjusted for free for life. A surprise engagement ring is therefore less risky than you might think. Every Laveran ring comes with:

• returns accepted within 30 days;
• free resizing for life;
• a lifetime warranty on craftsmanship;
• free polishing and prong checks for life;
• the IGI or GIA certificate for its diamond.

Some people take another approach: propose with the "safe bet" ring, then, if she was dreaming of another style, use the 30-day return window to choose one together. Others propose without a ring and pick it out as a couple. For the proposal itself, see our tips for giving an engagement ring during an unforgettable proposal.

A touch that always lands: engraving is complimentary. The date of the proposal or your initials inside the band make the ring unique, whatever the style.

Showroom or video call: how does the appointment work?

At your appointment, in a showroom or by video call, an expert helps you choose the style, the diamond, the metal and the size. It's often the step that makes everything click when you don't know what to choose. To make the most of it, bring:

• photos of her jewelry, and one of her rings if possible;
• a budget, even a rough range;
• your planned proposal date.

You'll be able to try on shapes and settings and compare diamonds under a loupe. Our 11 showrooms in France welcome you by appointment: Paris (9 rue Buffault), Lyon, Nice, Marseille, Bordeaux, Toulouse, Lille, Montpellier, Annecy, Aix-en-Provence and La Rochelle. Whether you're proposing in Paris or anywhere else, a video appointment lets you do everything remotely.

As for timing, each ring is made to order in 2 to 3 weeks. Some models are available in stock, and others can be made in a few days with express production: the exact lead time is confirmed at your appointment. Delivery is free, insured and hand-delivered. Proposing over the holidays? Read when to order your ring for a Christmas proposal.

Frequently asked questions

What ring should you give for a marriage proposal?

Traditionally, a diamond engagement ring. If you don't know her taste, a round or oval solitaire in white gold or platinum is the safest choice. At Laveran, it costs €880 with a 0.30 carat diamond and €1,744 with a 1 carat diamond (H/VS2 quality).

Is a proposal ring the same as an engagement ring?

Yes. The ring given during the proposal is the engagement ring, often a solitaire. The wedding band is the ring exchanged on the wedding day, and is then worn together with the engagement ring.

Should you choose the engagement ring together or make it a surprise?

Both are common. A surprise is the tradition; choosing together rules out mistakes. With returns accepted within 30 days and free resizing for life, a surprise no longer carries much risk.

How do you pick an engagement ring without her knowing?

Look at her jewelry (metal color, size of the pieces), note her reactions, ask a close friend for help, then book an appointment with photos of her jewelry. An expert will help you turn those clues into a ring.

How can you find her ring size without a ring sizer?

Borrow a ring she wears on her ring finger, or trace its inner circle on a sheet of paper: the diameter is enough. Otherwise, pick an average size, since resizing is free for life.

How much should you budget for a proposal ring?

For a lab-grown diamond, plan on €1,136 to €1,744 for a 0.50 to 1 carat solitaire at Laveran, and from €880 for 0.30 carat. You can pay in installments with Alma.

Is a lab-grown diamond suitable for a proposal?

Yes. A lab-grown diamond is a real diamond: pure carbon, a hardness of 10 on the Mohs scale, the same brilliance as a natural diamond. It's IGI or GIA certified and costs up to 80% less for the same quality.

How long does it take to get the ring?

Allow 2 to 3 weeks for a made-to-order ring. Some models are in stock, and others can be made in a few days with express production: the lead time is confirmed at your appointment.

Still not sure which ring to choose? That's normal, and it's exactly what we're here for. Book an appointment in one of our 11 showrooms or by video call, bring a few photos of her jewelry, and we'll help you find the proposal ring that feels like her, with complete discretion.

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