How Do I Know Which Diameter Lashes to Use?

If you've ever looked at your lash trays and thought, “Which diameter should I actually be using?” you're definitely not alone!

Choosing the right lash diameter is an important part of creating a beautiful set while making sure you're working appropriately with your client's natural lashes.

At Phatlash, we stock 0.03, 0.05 and 0.07 for Russian Volume, alongside 0.15 and 0.20 for Classic lashes. But what's the difference, and when should you use each one?

What Does Lash Diameter Mean?

The diameter is the thickness of the individual lash extension, measured in millimetres.

The smaller the number, the finer and lighter the lash.

When choosing your diameter, you need to consider your application technique, the size of your volume fans and your client's natural lashes.

Let's break down the Phatlash diameters.

0.03 – Ultra-Fine Russian Volume

Our 0.03 lashes are the finest option in our Russian Volume range.

Because they are so lightweight, they're ideal for creating larger, fluffier volume fans while keeping the overall fan weight low.

They're a great choice when you're looking to create an extremely fluffy, lightweight Russian set.

Think mega volume-style fluffiness and dramatic fans, while still using an ultra-fine individual lash.

0.05 – The Versatile Volume Favourite

0.05 is one of the most versatile Russian Volume diameters.

They're fine enough to create beautiful volume fans but provide slightly more presence than a 0.03 lash.

They're perfect for creating soft, fluffy Russian sets and can be used across a range of fan sizes, depending on the client's natural lashes and your desired result.

If you're building your Russian Volume collection, 0.05 is definitely one to have in your kit.

0.07 – Russian Volume with More Definition

Our 0.07 Russian lashes are slightly thicker and provide more definition.

They're ideal for creating smaller, softer volume fans where you want a little more density and definition.

They're particularly useful when you're creating a more natural-looking Russian set rather than an extremely fluffy, dramatic finish.

Remember, the larger the fan, the more fibres you're placing onto one natural lash, so you need to consider the overall weight of the finished fan — not just the diameter of one extension.

0.15 – Classic Lashes

Moving onto Classic lashes, our 0.15 is a popular choice for creating a defined classic set.

Classic application involves applying one extension to one natural lash, so the diameter has a direct impact on the finished appearance.

0.15 is a great option when you want a defined, polished and noticeable classic look without going straight to the thickest diameter.

It's a great everyday choice for many classic lash sets, provided the client's natural lashes are suitable.

0.20 – Bold Classic Sets

Our 0.20 Classic lashes are thicker and create a much bolder, darker and more dramatic appearance.

They can be used when you're looking for a statement classic set, but it's particularly important to assess the client's natural lashes before choosing this diameter.

Just because you want a dramatic look doesn't mean you should automatically reach for the thickest lash. The natural lash needs to be able to comfortably support the extension.

So, Which Diameter Should I Choose?

Here's a quick guide to the Phatlash range:

Diameter	Technique	Best for
0.03	Russian Volume	Larger, fluffy volume fans
0.05	Russian Volume	Versatile, soft and fluffy volume
0.07	Russian Volume	Smaller fans with more definition
0.15	Classic	Defined, polished classic sets
0.20	Classic	Bold and dramatic classic sets

Remember: Diameter Isn't Everything

When selecting your lashes, don't look at diameter in isolation.

For Russian Volume, you also need to consider how many lashes you're putting into your fan. A 0.03 fan containing more extensions can have a very different overall weight to a smaller 0.07 fan.

For Classic lashes, consider the length and thickness of the client's natural lashes, as well as the extension you're applying.

Your client's natural lash health should always come first.

Stock Up on Your Favourite Diameters at Phatlash

Whether you're creating soft classics, bold classics or fluffy Russian Volume sets, having a selection of diameters in your kit allows you to customise every appointment.

At Phatlash, our lash range includes 0.03, 0.05 and 0.07 Russian Volume lashes, plus 0.15 and 0.20 Classic lashes, giving you the flexibility to create a range of different looks.

Choose your diameter based on the technique, the desired result and, most importantly, what is suitable for your client's natural lashes.

Ready to build your lash collection? Shop the Phatlash range and find the perfect diameter for your next set!