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Eyelash Extension Chart

This eyelash extensions chart helps you to show your customers the different types of lash extensions, sizes, and curls that are available.  The image shows the differences between the curls, thicknesses, and lengths, although they are not to scale, it will give you an idea of some of your choices.  

Types of Lash Extension Curls

Curls of lash extensions set the overall appearance of the eyes, and the right use of curls can even enhance the client's natural eye shape. No one curl fits for all.

When it comes to choosing the lash extension curl, it is vital to set a goal of what style you are trying to achieve for the particular client's eye shape, natural lash's angle, and characteristics.

It is important to note that not all curls will have the same retention or longevity. The curlier the lash offers less retention because there is less of the natural lash for the base of the extension to attach to.

So it is important to choose a right combination of curl and thickness of extensions according to your client's natural lash.

Curls for Straight-Angle Natural Lash

I Curl:
Less known curl, I Curl eyelashes are almost straight looking curl, and they can be used for the male clients who want to enhance the thickness of their lash but not necessarily want to have curl.

J Curl:
J Curl eyelashes are the most natural looking curl. These lashes are especially suitable for the clients who have stick straight lashes pointing straight or upward. If you apply J curl to the downward looking natural lash, it will make the eyes look smaller and heavy.

B Curl:
B Curl lash extensions will give the straight natural lashes a bit more "lift" than J curl. B curl has a bit more curl than a J curl but is still an excellent option for the client with straight lashes, pointing straight or upward.

B Curl lashes offer a soft curl, a standard for a naturally enhanced lash appearance with good retention.

Curls for Straight & Downwards-Angle Natural Lash

C Curl:
C Curl lashes are intended for clients with a slight curl in their natural lash and will create an open-eye effect. C Curl is the most popular curl; it is glamorous and opens the eye.

If C curl is used for the client with slightly downward angled lashes, it will give a satisfying lash lift, if used for the client with close-to-horizontal angle lashes, it will give a fabulous doll eye effect. For the client with heavily downward-angled lashes, we recommend using D curl instead.

D Curl:
D Curl lashes are very similar to C Curl lash extensions, just curlier. They are especially effective for clients with downward-angled lashes who wants a show stopping look. These lashes will brighten and widen the eye and give a noticeable curled effect.

Because of its dramatic upward curl, if used for clients with upward-angle natural lashes or with heavily hooded eyelids, the extensions may prick the client's eyelids- for that reason, D curl is more suitable for the client with downward-angle natural lashes.

It's one of the curlier curls, if not applied correctly, retention may not be as great as the straight curls, but it adds drama and opens the eye more, making it excellent for downward-angled lashes. 

U Curl:
U Curl lashes are the curliest lash extensions. They are suitable for clients with downward-angled lashes who want the most dramatic doll-like eyelashes. These lashes will give a noticeable curled effect.

Just like D curl, because of its dramatic upward curl, if used for clients with upward-angle natural lashes or with heavily hooded eyelids, the extensions may prick the client's eyelids- for that reason, U curl is more suitable for the client with downward-angle natural lashes.

It's the curliest curl, if not applied correctly, remember retention may not be as great as the straight curls. 

Curls for Extremely-Downwards-Angle Natural Lash

M Curl gives the opposite effect to what J curl does. Its shape being with a small surface for the flat base and dramatic curl upwards, M curl is designed to lift the appearance of downward-angled natural lashes.

Because of the dramatic upward angle, you will be able to give a lash lift and wide-eye effect.

M Curl is not recommended for the client with hooded eyelids or upward angled natural lash.

Curls for Hooded Eyelids, Droopy Eyes

L and L+ Curl are essentially C or D curls with a flat base. Because of the flat base, you will be able to give your client the ultimate eyelid lift.

L and L+ Curl are developed to give a wide-eye effect to the clients with hooded eyelids, deep-set eyes, older clients with droopy eyelids. L+ is slightly curlier than L.
These are the most visually rewarding lash extensions.

However, because of their long flat base, if used on downward-angle lashes, it will appear to be heavy and unflattering. 

Curls for Beginner Lash Artist & Better Retention

The base curl of EZ Lash is straighter than the normal extension lashes, and as a result, EZ lash provides more adhesive area for extensions and allows much easier extension experience for beginner lash artists. Thanks to its wider adhesive area, EZ curl lashes also provide better retention.

However, because of their long flat base, if used on downward-angle lashes, it will appear to be heavy and unflattering. 

Here is a fact: Did you know all lash extension curls exist in the market except J and C curl was originally invented by BL Lashes? As a result, we have the broadest range of curls to offer. We believe having a variety of curls in your salon will enable you to serve your clients tailor to their eye shape and desired style.

Eyelash Extension Size Chart and Guidelines

Thickness (Diameter)

Choosing the right diameter of the eyelash extensions for a client is critical. When deciding the thickness, You should always not only consider the design aspect but the most importantly, your client's natural lash condition.

Some thicker extensions (above 0.20, for example) can be too heavy for some clients' natural lash. A wrong choice could cause poor retention and premature fall of the extensions.

Generally, Asian's natural eyelashes are thinner than other ethnicities. For Asian clients, it is recommended to use lash extensions diameter between 0.10~0.15mm whereas other ethnicities with stronger natural lashes can take 0.15~0.20mm for the classic extension.

However, regardless of the ethnicity of the client, you should always take a good look at the client's natural lashes and decide what thickness is suitable for the client.

0.03mm, 0.05mm and 0.06mm diameter 

Extremely thin and lightweight lash, and used mostly for Russian Volume to Mega Volume. The weight of ONE 0.15mm lash equals 20 of 0.03mm lashes, 9 of 0.05mm and 5 of 0.07mm lashes. 

0.07mm diameter

Popular thickness for Russian Volume for 2D~6D.

0.10mm diameter

This thickness can also be used for Volume 2D~3D (depending on the natural lash thickness and length) or as Classic 1D on thinner very fine natural lashes.

0.12mm diameter

Used on thinner lashes (Classic 1D) or for a softer wispier look and feel.

0.15mm diameter

This is the most popular, average lash thickness, creates a naturally thicker look (Classic 1D).

0.18mm diameter

This lash extension thickness creates a slightly bolder look than 0.15mm lash.

0.20mm diameter

The second most popular thickness for the classic extension. This lash extension thickness creates a natural mascara look. Recommend using for thick and healthy natural lash only.

0.25mm diameter

It creates a glamorous look, though this lash may be too heavy for most people's lashes.

Eyelash Extension Lengths

BL lash extensions come in lengths from 5mm-20mm. The majority of clients want their longest extension length to be around 11mm or 12mm.

Naturally, many customers want the longest lashes, but it is essential to keep in mind that the length of the extension should be chosen by the individual client's lash condition. It is your responsibility to guide your client that the lashes too long for the natural lash may cause a premature fall of extensions.

Choose slightly longer lashes for the clients with hooded eyelids, or droopy eyelids. Their lashes tend to 'hide' under the eyelids when the eyes are open.

When using the curlier curls like D, U curl, remember when the curl is strong, the length of the extension will appear shorter. So choose the lash length accordingly to the curl you are using.