Lash extensions are an extremely popular salon service, and it is no surprise as to why. Your clients can achieve fullness, length, glamour, and sophistication in just one appointment.

Whether you’re looking to expand your existing salon services or you are simply refreshing your knowledge, in this guide,  we share everything you need to know about the different lash curls, including how to consider the right lash curl shape for your client based on their eye shape and the desired effect.

What are the different types of lash curls?

False lash extensions are available in several curl types named after a letter, such as ‘C curl lashes’ or ‘D curl lashes’. As you can see from the image below, the ‘type’ of lash, i.e. D, C, B, L refers to the prominence of the curl.

Photo by Hayley Kim Design

What type of lash curl is the most popular?

The C curl lash is one of the most popular eyelash extension options due to its diversity and ability to work well for both an everyday and nighttime look.

Every client will prefer a different lash look, and with so many lashes available, you’ll be able to source their perfect match within your initial consultation.

We recommend showing your client some examples of your work, so they can see how their lash extensions may look on themselves. This is especially important if this is their first appointment.


What is a B curl lash?

B curl lashes provide a subtle uplift and look like natural eyelashes curled using a manual eyelash curler

The B curl lash offers a gentle lift to the lashes without creating an overly dramatic or pronounced effect. Individuals who desire a more subtle enhancement to their natural lashes often choose the B curl.

Ideal for

Clients that want to match the natural curvature they are used to.

Avoid On

Clients who have down-pointed lashes.

Marvelash B Curl Lashes 0.20 Volume Assorted Lengths Black


Key Features

  • Super soft lashes
  • Assorted lengths (9,11,13,15mm)
  • Optimum B curl for a subtle curl
  • Adhesive peel-off strips

What is a C curl lash?

C curl lashes are the most universally flattering false lashes, offering that wide-eyed Bambi eye look without looking too dramatic. C curl lashes are the perfect in-between choice as they can look both natural and defined and are ideal for day and nightwear. 

Ideal for

Clients, including those with downward-pointing lashes and straight lashes.

C curl lashes are universally flattering.

Marvelash C Curl Lashes 0.20 Volume Assorted Lengths Black




Key Features

  • Have a unique flat base which means a greater contact area for better application.
  • Enhanced C Curl.
  • Volume 0.20 intense look.

The Eyelash Emporium Full Screen Tray Lashes C Curl 0.05 

The Eyelash Emporium Full Screen Tray Lashes C Curl 0.05 Mixed Lengths




Key Features

  • Super soft, light, and silky, with a strong depth of colour to achieve a denser, fuller look.
  • Available in weights 0.05-0.20.
  • Sixteen rows of mixed-length lashes.

Lash FX Pre-Fanned Instant Russian Lashes

Lash FX Pre Fanned Instant Russian Lashes



Key Features:

  • The ultra-fine lashes are perfectly fanned out and ready for application.
  • C curl for added lift.
  • Lightweight.
  • Instant Russian effect.

What is a D curl lash?

D curl lashes amp up your client’s lashes. D curl lashes bring drama and really define the eyes. 

Ideal for

Nights out or glamorous occasions, thanks to the impact they make.

D curl lashes are especially impactful on clients with naturally down-pointing lashes.

Avoid On

Clients with hooded eyes due to how the curl could catch on your client’s upper eyelid skin.   

Marvelash D Curl Lashes 0.20 Volume Assorted Lengths Black

Marvelash D Curl Lashes 0.20 Volume Assorted Lengths Black



Key Features

  •  Super soft style with 0.20 volume thickness.
  • They are an enhanced D curl for curlier natural lashes.
  • 0.20 Volume thickness.

What is an L curl lash?

An L-curl eyelash is a type of eyelash extension style that is designed to create a dramatic and lifted effect on the eyes. It is named “L curl” because the shape of the lash extension resembles the letter “L” when viewed from the side.

The L curl differs from other lash extension curls, such as the C curl, in terms of its curvature and lift. It has a more pronounced curl that starts closer to the base of the lash and then straightens out slightly towards the tip, creating an L-shaped angle. This shape helps to open up the eyes and provide a wide-eyed, doe-like appearance.

Ideal for

Straight or downward-pointing natural lashes as they provide a significant lift and enhance the overall look of the eyes.

Avoid On

Clients with very short or weak lashes.

The Eyelash Emporium Full Screen Tray Lashes L Curl 0.20 

The Eyelash Emporium Full Screen Tray Lashes L Curl



Key Features

  • Available in weights 0.05-0.20.
  • 16 rows of mixed-length lashes

Which lash style is best for your client?

1. Classic Lashes

Classic lashes create longer, thicker lashes that look and feel like your own. The technique uses fine lashes that enable the therapist to attach one lash extension per lash. 

Treatment time: A complete set can take anything between 1 to 2 hours and a half set of 1 hour to create. 

2. Russian Lashes

Russian lashes offer beautiful, full-volume, feathery lashes. The technique uses ultra-fine, lightweight lashes that enable the therapist to attach anywhere between 2-6 lash extensions per lash, thereby boosting the volume of each lash. 

Treatment time: A full set can take 90 minutes to 2 hours.


Related: How to create the full Russian lash look on your clients

Eyelash application process tips


Begin each lash journey with a detailed consultation, considering the client’s eye shape and natural lash health. Also, take the time to understand your client’s expectations, preferences, and concerns. Doing so will help you identify which lash curls & lengths to apply and tailor the lash style to ensure a satisfied client.

Prep & Prime

Before application, ensure the client’s lashes are cleansed and free from any residue or makeup. Use a gentle cleanser to remove any oils or debris to ensure a clean surface. For optimal adhesive bond strength. You can also apply under-eye pads to protect your clients lower lashes.

Adhesive Selection

Choose a high-quality adhesive that provides a strong bond while ensuring client comfort. Consider factors like drying time, fume level, and sensitivity to ensure a positive experience for your clients.


Apply each individual synthetic lash to the client’s natural lashes using precise and careful placement. Ensure proper isolation of each lash to prevent stickies and ensure a seamless, natural look. Remember, attention to detail is key!

Aftercare tips for your clients

Once you’ve finished your client’s lash set, it’s important to give them proper aftercare instructions to help their lash extensions stay healthy, last longer, and maintain their quality.

Here are some aftercare suggestions:

  • Encourage gentle cleansing of the eye area, using a lash-friendly cleanser or foam to remove makeup and debris.
  • Advise against using oil-based products, including mascara and waterproof eyeliner, near and on the lashes, as they can weaken the adhesive bond.
  • Emphasise the importance of daily night-time cleansing and brushing of the lashes with a clean spoolie to prevent dirt from building up on the lashes and promote a polished look.
  • Accentuate that clients should not pick at or pull on the lash extensions as this can cause damage to both the extensions and natural lash.


What lash thickness should I use?

We recommend the following guidelines when it comes to choosing the right thickness. Lash extensions are available in a range of thicknesses from 0.03mm to 0.25mm. You can also choose from a range of lengths from 4mm to 15mm.

  • Volume 0.20 – Perfect for a full and voluminous lash look. 
  • Fine 0.10 – Ideal for a natural lash look.
  • Extra fine 0.07 – Perfect for Russian lash application.
  • Ultrafine 0.05 – Suited to a Russian lash application.

Related: 35 memes every beauty therapist will relate to

FAQs about lash extensions

Salon System answers your burning questions about lash extensions, the application process and lash adhesive.

Q: How long should a full set of lashes take? 

A: Treatment times vary from 1 ½ – 2 hrs for a full set, 1hr for a half set and 20-30 mins for an express treatment.

Q: How long do lash extensions usually last?

A: With proper care, lash extensions should last for up to six weeks.

Q: What is the best way to store lash adhesive?

A: You should always store your glue upright in a cool, dark, and dry space. The key to keeping it fresh is consistently at a low temperature (lower than 75 degrees) + low humidity.

Q: What is the shelf life of lash glue?

A: If properly stored, your adhesive should last up to three months unopened. The shelf life, or expiration date, for opened adhesive, is four to five weeks. If your lash extension glue becomes stringy or thick, it’s time to cut ties and replace the bottle.

Q: Which is the best lash glue?

The Eyelash Emporium Master Artist Adhesive 5ml Black




The Eyelash Emporium Master Artist Adhesive is perfect for advanced classic and volume lash artists.

Key Features:

  • A quick 1-2 seconds drying time.
  • Free from latex and formaldehyde.
  • Low odour.

Salon System Individual Lash Adhesive Black 15ml



This black individual lash adhesive created by Salon System seamlessly adheres individual lashes to natural lashes.

Key Features

  • Great for cluster lashes.

The Eyelash Emporium Master Artist Adhesive 5ml Clear



This is a brand new, clear formula with a completely re-sealable pouch to lock in moisture.

Key Features:

  • Perfect for volume and mega-volume lashes.
  • Short drying time and low odour.
  • It can be used with colourful lash collections.

Shop lash extension accessories, lashes and adhesives at Salons Direct!