What size should an Engagement Ring Diamond be?

What Size Should An Engagement Ring Diamond Be?

A question that we get asked a lot is what size diamond should an engagement ring be? We explore the average diamond size for an engagement ring.

One of the questions that is asked a lot is “What size diamond should an engagement ring be?” It’s a question that’s difficult to answer as an engagement ring is a personal piece of jewellery that has its own meaning and story behind it.

The world of engagement rings continues to evolve. Among the intriguing facets of this evolution are the trends in average engagement ring sizes that have been capturing hearts and imaginations. Join us as we delve into the fascinating world of engagement rings, exploring the ever-changing landscape of styles and sizes that shape the way we express love and commitment today.

The average carat size for an engagement ring in the United Kingdom is 0.6 carats, with a price tag of £1,800. It’s worth noting that the price can vary massively depending on what you select when considering the specifications of the ring itself. 

It's worth looking at different diamond shapes, from princess cut to emerald to find out how each shape looks in terms of carat weight and design for the engagement ring. It’s also important to consider the person’s hand size so that the ring fits comfortably on their finger. 

If you are still unsure about what size an engagement ring diamond should be, we explore what size a diamond for an engagement ring should be. 

What is a Carat?

A carat is used to measure the weight of a diamond. One carat is the equivalent of one-fifth of a gram (200 milligrams). It’s important to note that the size of the diamond is not linked with the carat weight. Similar to a human body, the larger the diamond is, the more likely it is that it will weigh heavier than a smaller stone. 

There are other factors that can affect the diamond’s size with the engagement ring. How the diamond is cut can have a massive impact on the carat weight. Poorly cut diamonds will not only retain their heavy carat weight but will also be hidden in the gem’s base. It means that the diamond will appear smaller on the ring wearer’s finger.

The average Diamond size for Engagement Rings

When it comes to the average diamond carat size for engagement rings, it depends on both the location and demographics. The average carat size in Europe is 0.5 carats, which is smaller than the UK at 0.6 carats and the United States at around one carat. 

Age also plays an important factor in the average diamond size for engagement rings. People in their twenties and early thirties choose diamonds that are between one and two carats. As people get older, they choose larger diamonds for their rings. 

This is down to the fact that they’ve saved plenty of money and have progressed in their careers to be able to afford a more expensive ring.

Is it worth buying a large Diamond for your Engagement Ring?


This depends on a number of factors, such as the carat weight and price. As larger diamonds are more expensive than smaller diamonds, you should not sacrifice the quality of the diamond when shopping for a large ring on a budget. 

Before you consider buying a large diamond for your ring, it’s worth versing yourself in the four Cs (colour, cut, clarity and carat). Knowing what the four C’s are, will help ensure that you are buying a diamond engagement ring that your partner will want to wear every day on her finger.

If buying a large diamond is a key factor in your engagement ring purchase, then it's worth choosing the highest carat for your budget, alongside the cut grade. A good cut large diamond will allow the diamond to sparkle while masking any colours that come out of the gem itself. 

Should you buy a small Diamond over a large Diamond for your Engagement Ring?

If your partner has small hands, then it's worth going for a small diamond for her engagement ring over a large diamond. As larger diamonds are more expensive than smaller diamonds, it’s all about working within your budget to find a ring to pop the question to your partner.

Large diamonds are at risk of being damaged if your partner decides to wear them every day. If you choose a large diamond for an engagement ring, it’s worth thinking about how often she’ll be wearing the ring. If she wants to wear the ring on a regular basis, it may be worth buying a smaller diamond over a large one. 

While carat weight is an important factor in buying an engagement ring, so is the clarity of the diamond. Imperfections are more noticeable in larger diamonds than in smaller diamonds. Any natural flaws or yellowish tints will be easily seen on a large diamond over a small diamond, which is worth getting a high-quality small stone over a large one.

Ultimately, it comes down to what you are looking for when it comes to the size of the diamond you want in your engagement ring. 

Buy your Diamond Engagement Ring from Diamond Heaven today

When it comes to answering the question of “What size diamond should an engagement ring be?”, it's ultimately down to personal preference. An engagement ring is an extremely personal piece of jewellery that holds all sorts of meanings and stories for each individual.

Struggling to finance your engagement ring? Our 0% finance option allows you to spread the cost of your ring for up to six months with a minimum 10% deposit. 

Still in the process of shopping for your engagement ring? Our team of experts at Diamond Heaven will ensure that you get a diamond engagement ring that your partner will say yes to. Book an appointment at one of our stores today and we’ll make sure that you get a ring that she’ll never want to take off her finger.