Thinking about popping the question in 2025? If you are shopping for an engagement ring, chances are you have wondered what diamond size is considered normal these days and whether you should follow the trend or go with something more personal.
In the United States, the average center stone size is 1.1 carats for natural diamonds and 1.75 carats for lab-grown diamonds.
How do we know that? We went straight to the one source that would really know: James Allen, the largest online diamond seller. That’s exactly what they told us. That’s what a 1.1 carat diamond ring actually looks like worn on hand:
We are specifically referring to the carat weight of the center stone only, not the total carat weight of the ring. Some engagement rings include side stones, pavé accents, or additional diamonds in three-stone settings that increase the overall weight. But that is not what we are talking about here. This is about the size of the single main diamond, most often featured in solitaire, halo, or three-stone designs where the center stone remains the focal point.
It is also important to note that many reports and media articles mix the data from natural and lab-grown diamonds into a single “average” number. This can be misleading. Natural and lab-grown diamonds follow different pricing models and consumer behaviors, so their average carat sizes should always be presented separately. We make that distinction clear here to give you a more accurate picture of what buyers are really choosing.
Lab-grown diamonds have made it possible for couples to get a noticeably larger stone without increasing their budget. Just five years ago, the average natural diamond sold for an engagement ring was around 0.9 carats. Today, many couples are choosing lab-grown diamonds that are 1.5 to 2 carats or more, while spending less than they would have on a smaller natural stone. This shift has also put pressure on natural diamond prices, which is one reason why the average size of natural diamonds has increased in recent years.
Average Diamond Size by Region
Diamond preferences vary depending on culture, income levels, and buying trends in different parts of the world. While some countries lean toward modest carat weights, others have embraced larger stones especially with lab-grown options becoming more popular.
Of course, what’s considered “average” can vary widely depending on where you are in the world. Let’s take a look at how center stone sizes differ across major regions in 2025, with separate averages for natural and lab-grown diamonds:
| Average Diamond Size by Region (2025) | ||
| Region | Natural Diamond Size | Lab-Grown Diamond Size |
|---|---|---|
| United States | 1.1 carats | 1.75 carats |
| United Kingdom | 0.65 carat | 1.1 carats |
| Europe (general) | 0.60 carat | 1.0 carat |
| Canada | 1.0 carat | 1.5 carats |
| Australia | 0.9 carat | 1.4 carats |
| Japan | 0.4 carat | 0.7 carat |
| China | 0.55 carat | 0.9 carat |
| India | 0.6 carat | 1.0 carat |
While the average diamond size in the United Kingdom and across much of Europe tends to fall between 0.6 and 0.7 carat, this does not reflect a lack of quality or sentiment. In fact, European shoppers often prioritize factors like diamond cut, origin, and ethical sourcing over sheer size. Similar to Japan, many European cultures embrace a more discreet and timeless approach to jewelry. Flashy rings are less common, and smaller stones are often viewed as refined and appropriate for everyday wear.
In the UK specifically, there is also less of a cultural expectation tied to a “one carat standard.” Engagement rings are highly personalized, and many couples choose alternative gemstones, heirloom rings, or minimalist settings. Budget plays a role as well: higher VAT, strong currency fluctuations, and tighter housing markets often shape spending choices, and a lower average carat size is simply a reflection of different priorities.
In contrast, the United States tends to associate larger diamonds with personal success, romance, and status. There is more of a social script around reaching the one carat mark, and diamond marketing campaigns over the last several decades have strongly reinforced that idea. Add to that the availability of competitive financing, wider acceptance of lab-grown diamonds, and a strong gifting culture, and it is no surprise that the U.S. continues to lead with higher average carat sizes.
How Much Are People Spending on Engagement Rings in 2025?
As of 2025, the average amount spent on an engagement ring in the United States is approximately $6,567. This number was calculated by averaging engagement ring costs across all 50 states, giving each state equal weight regardless of population size or income levels. The data comes from the most recent figures published by World Population Review.
We’ll show you the top five and bottom five states by engagement ring spend below. If your state isn’t listed here, you can check where it ranks on the World Population Review website, it’s actually quite interesting.
Top 5 States by Average Engagement Ring Spend
According to the 2025 data, the five states with the highest average spend on engagement rings are:
- Washington – $10,109
- California – $9,482
- Illinois – $9,197
- Kansas – $8,947
- New Jersey – $8,842
If you were shopping with a Washington-sized budget, you could easily pick up something like this 1.60 carat G color SI1 clarity diamond from James Allen for around $9,100. Pair it with this slightly fancy 14K White Gold Rope Solitaire setting for $780, and you have a stunning engagement ring that fits right within the average spend of the state’s top-tier buyers. G color paired with SI1 clarity offers some of the best value for a white gold ring, striking a great balance between beauty and budget.
Bottom 5 States by Average Engagement Ring Spend
On the other end, these five states had the lowest average engagement ring budgets:
- South Dakota – $3,005
- Maine – $3,184
- Utah – $3,184
- Mississippi – $4,106
- Delaware – $4,106
If you were shopping for an engagement ring with the lowest average U.S. budget of $3,005, your best value would come from choosing a lab-grown diamond. This stunning 2.37 carat G color SI clarity lab-grown diamond costs just $2,320. You could pair it with this 14K white gold Classic Solitaire setting for $640. Ironically, by choosing lab-grown, you could end up with a larger and more impressive center stone than someone shopping for a natural diamond even with the highest engagement ring budget in the country.
These variations in spending can be attributed to factors such as regional economic conditions, cultural norms, and personal preferences. It is worth noting that while these figures offer a general overview, actual spending often varies significantly based on personal circumstances and values.
Factors Influencing Engagement Ring Costs
Here are some of the biggest factors that shape engagement ring prices:
- Center Stone: Choosing lab-grown instead of natural can significantly lower the cost while increasing the carat size.
- Metal Type: Platinum bands usually cost more than gold or mixed metals.
- Design Complexity: Intricate settings like halo or pavé styles often come at a premium.
- Retailer: High-end designer brands typically charge more than online vendors or custom jewelers.
The old guideline of spending two to three months’ salary on an engagement ring is becoming outdated. Modern couples are prioritizing financial stability and personal preferences over traditional norms. Many are opting for lab-grown diamonds or alternative gemstones to maximize value without compromising on aesthetics.
Ultimately, the amount spent on an engagement ring should align with individual financial situations and personal values, ensuring that the symbol of commitment doesn’t lead to financial strain.
Why Lab-Grown Diamonds Are Changing the Game
Lab-grown diamonds have completely reshaped how people shop for engagement rings. While natural diamonds are still popular, more and more couples are turning to lab-grown options because of one simple truth: they get significantly more diamond for their money.
In 2025, the average lab-grown center stone is around 1.75 carats, compared to 1.1 carats for a natural diamond. That size gap is not just a coincidence. Lab-grown diamonds cost up to 80% less than their natural counterparts, which means buyers can afford a bigger, higher-quality stone without going over budget.
The rise of lab-grown diamonds has also changed expectations. What used to feel extravagant now feels accessible. Two-carat diamonds, which once required a five-figure investment, are now within reach for couples who want something eye-catching but still financially smart.
On top of that, lab-grown diamonds are chemically and optically identical to natural ones. They are not simulants or fakes, they are real diamonds grown in a lab using advanced technology. That means they still score top marks for brilliance, fire, and durability when cut well.
For many buyers, the shift is not just about price. It is also about values. Lab-grown diamonds are often seen as a more ethical and sustainable option, especially when sourced from labs using renewable energy.
Whether it is about size, savings, or peace of mind, lab-grown diamonds are no longer a niche but they are the new normal.
How to Choose the Right Diamond Size for You
While national averages can offer useful context, the best diamond size is the one that feels right for your lifestyle, your budget, and your personal style. There is no universal rule, there is only what works for you.
Think About Finger Size and Proportions
The same diamond can look very different depending on the finger it is worn on. A one-carat diamond may look large on a size 4 finger and modest on a size 8. If finger coverage is important to you, pay attention to the diameter of the diamond, not just the carat weight. Shapes like oval or marquise can also create the illusion of a larger size.
Consider Your Daily Routine
If you work with your hands, wear gloves often, or live an active lifestyle, you might prefer a slightly smaller diamond or a low-profile setting to avoid snags and scratches. Big diamonds are beautiful but practicality matters, especially for something you’ll wear every day.
Set Your Budget First
There is no shame in choosing a 0.70 or 0.80 carat diamond if it means you can invest in better cut quality or a more secure setting. In fact, diamonds just under major carat milestones (like 1.0 or 1.5) often offer the best value. Lab-grown diamonds can also give you more size for less without compromising sparkle.
Quality Over Quantity
A beautifully cut diamond that sparkles from across the room will always look better than a larger stone that’s dull or poorly proportioned. Prioritize cut quality first, then choose the carat weight that suits your taste and budget.
Make It Personal
At the end of the day, this ring is a symbol of your relationship—not a competition. Whether it is 0.5 or 3 carats, the value is in what it means to you and your partner. Choose what brings you joy, not what you think is expected.
Does Bigger Always Mean Better? A Reality Check
Choosing the right diamond is not about chasing a number. It is about understanding what truly matters to you and your partner. Carat size will always play a role. It is a visible detail, and for some people, it holds personal meaning. But it should never overshadow the bigger picture.
Cut quality, setting design, ring proportions, and personal taste all carry just as much weight in how the final piece looks and feels. A smaller diamond that sparkles brilliantly will always feel more impressive than a larger one that appears flat or lifeless. And a diamond that reflects your values, whether it is mined, lab grown, vintage, or chosen with a specific budget in mind, can carry far more emotional value than any carat figure ever could.
There is no single correct answer, only what feels right for you. Some people fall in love with a one carat round brilliant. Others are drawn to a zero point seven carat marquise in a vintage setting. Some want to choose a two point five carat lab grown diamond in a halo setting. None of these choices are wrong.
Let averages guide you, but not define you. The most meaningful sparkle is the one that fits your hand, your heart, and your story.
Key Takeaway
Choosing the right diamond is not about chasing a number. It is about understanding what truly matters to you and your partner. Carat size will always play a role. It is a visible detail, and for some people, it holds personal meaning. But it should never overshadow the bigger picture.
Cut quality, setting design, ring proportions, and personal taste all carry just as much weight in how the final piece looks and feels. A smaller diamond that sparkles brilliantly will always feel more impressive than a larger one that appears flat or lifeless. And a diamond that reflects your values, whether it is mined, lab grown, vintage, or budget friendly, can carry far more emotional value than any carat figure ever could.
Let averages guide you, but not define you. The most meaningful sparkle is the one that fits your hand, your heart, and your story. If you apply the tips we covered above, you will be able to get the highest quality diamond for your budget. As always, you will find the best value from trusted online vendors like James Allen or Blue Nile, where you can compare stones side by side and shop with total confidence.
There is no single correct answer, only what feels right for you. Some people fall in love with a one carat round brilliant. Others are drawn to a zero point seven carat marquise in a vintage setting. Some want to go bold with a two point five carat lab grown diamond in a halo. None of these choices are wrong.