When it comes to at-home lash extensions, one of the questions or topics we hear is about 30D vs 40D lash clusters. And we get it, the numbers can sound intimidating if you're new to the lash world. But don’t worry, this isn’t algebra. We're here to coach you through what those numbers actually mean, how they impact your lash look, and why finding the right density for your eyes can make all the difference.
At TAD Beauty, we’re all about making lash clusters more empowering, more comfortable, and more customizable than ever. So if you're trying to decide between lash clusters 30D vs 40D, we’ve got the answers right here. Let’s dive into the ddifference between 30D and 40D lash clusters, and which one is right for your signature style.
30D vs 40D Lash Clusters Comparison Chart
When we talk about 30D vs 40D lash clusters, we're talking about density. Specifically, how many individual lash fibers are bundled together into one lash cluster.
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30D = 30 individual lash fibers per segment
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40D = 40 individual lash fibers per segment
In the pro lash world, this terminology comes from promade lash fans. But in the world of at-home lash extensions, these numbers help you understand how full, dense, or voluminous your lash clusters will appear. For details on cluster lashes vs individual lashes we have tons of info in our post.
The higher the number, the more fibers and the denser the look.
What’s the Difference Between 30D and 40D Lash Clusters?
Let’s break down the real-world difference between 30D and 40D lash clusters. While both are beautiful, they serve different purposes in your lash wardrobe, think like comparing classic vs hybrid lashes.
Overview of 30D Lash Clusters
30D lash clusters include 30 lash fibers per segment. They offer a soft, wispy finish that mimics a classic lash extension look. If you’re all about the “clean girl” aesthetic, everyday wear, or natural glam, 30D clusters are your go-to.
At TAD, this look is embodied in styles like Bliss lash clusters or our Lush Stripment lashes, which are designed for extended wear lashes with light volume and tapered tips.
Overview of 40D Lash Clusters
40D lash clusters are denser, fuller, and a little more dramatic. With 40 lash fibers per segment, they lean closer to a volume lash look. These are the clusters that turn heads, ideal for date nights, photoshoots, or anyone who loves bold definition.
Styles like Dream and Wispy lean into this look, giving you texture, lift, and volume.
When it comes to seeing a lash cluster size chart, that is different than lash cluster length, we’re talking straight DENSITY.
Lash Clusters 30D vs 40D: Which is Right For You?
Now that we’ve broken down the distinct difference between 30D and 40D lash clusters, how do you know which is right for you?
How Much Lift You Want From the Curl
Let’s get one thing straight: the density of a lash cluster (lash clusters 30D vs 40D) does not affect its curl. At TAD, curl is built into the lash design, especially our dramatic L curl, which is used in many of our top styles.
So if you’re comparing 30D vs 40D lash clusters for curl, don’t. Instead, focus on length, style, and segment placement to get the eye lift you're after.
The Width of Each Segment and How It Fits Your Eye Shape
The width of 30D vs 40D lash clusters is a big one.
Lash clusters with more fibers (like 40D) can be slightly wider at the top, depending on the style. If you have smaller or hooded eyes, or prefer using fewer segments per eye, 30D lash clusters may feel more manageable and blend more naturally.
On the other hand, TAD’s Stripment Lashes are pre-mapped in three wide segments and can use either 30D or 40D density, but are designed for fast, foolproof application.
How Many Segments You Prefer Using in a Full Set
Most TAD Beauty users apply 5 or 6 segments per eye. That’s true whether you’re using lash clusters 30D vs 40D.
If you're building a set with higher-density clusters (40D), you may need fewer segments to achieve a full, bold lash line. This could mean quicker application if you're in a hurry, or fewer segments to fuss with if you're new to lash cluster mapping.
How Soft or Structured You Want the Lash Tips to Look
When it comes to how 30D vs 40D lash clusters look, 30D lash clusters tend to look softer and fluffier. 40D clusters offer a more structured, fanned-out top line that mimics volume lash extensions.
How Long You Want Each Set to Last Before Reapplying
Spoiler alert: lash clusters 30D vs 40D does not change the wear time. Wear time depends on:
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Prep (use TAD Prep Pads)
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Adhesive quality (Brilliant Bond)
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Aftercare ]
You’ll get 7-10 days of wear with either density when using TAD’s DIY lash system.
Why Smaller Lash Clusters Are Usually Preferred
Let’s be real: more is not always more.
When picking between lash clusters 30D vs 40D, if you're aiming for a natural lash look or a clean, daytime vibe, 30D clusters will always win. They’re:
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Easier to blend
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Lighter in look
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More versatile for mixed styles
But finding the best types of lash clusters for you is important, because a lighter look might not be enough to achieve the look you’re going for.
They Blend More Naturally With Fine Lashes
If your natural lashes are fine or sparse, 30D clusters will feel lighter and sit better. This prevents heaviness and keeps your lash line looking natural, not like it’s carrying extra weight.
Many of our most natural styles, like Bliss, feature 30D density to mimic classic lash extensions and deliver a “your lashes but better” finish.
Find Your New Favorite Lash Clusters at TAD Beauty!
At the end of the day, choosing between 30D vs 40D lash clusters isn’t about what’s “better.” It’s about what feels best for you, your eye shape, your lash goals, your comfort level.
TAD Beauty lash clusters are tech-forward, 3D printed, and Made in the USA for that new standard of quality you deserve.
Bringing Our 30D vs 40D Lash Clusters Comparison to a Close
Let’s recap the difference between 30D vs 40D lash clusters:
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30D offers softness, lightness, and a natural finish.
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40D delivers bold, full, voluminous impact.
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Curl and wear time are not affected by density.
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Both can be mixed and matched to build custom lash looks.
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With TAD Beauty’s precision designs, either option gives you comfort, confidence, and control.
Whether you want to feel effortlessly elegant or fully glammed up, we have the clusters for you. Because the best makes you your best, and you deserve the best.