L Curl vs LC vs M Curl Lashes: When to Use Each

L, LC and M are special curls with a straighter base section. L curl lifts with the sharpest turn, so it gives the most open, angular look. LC curl keeps the straight base but finishes with a softer, rounder curve. M curl moves into the lift more smoothly and looks lifted and elongated.

Curl names are not standardized. An L curl from one manufacturer may not match an L curl from another, so put the actual trays side by side before you switch brands mid-season.

Conventional curls (J, B, C, CC and D) start curving close to the base. That works well when the natural lashes already point forward or up. It works less well in two common situations:

• Hooded lids: When the lid fold sits low over the lash line, a curl that bends early can press into the lid or hide underneath it. A straighter base carries the extension out past the fold before it lifts, so the lift is visible when the eye is open.
• Straight or downward natural lashes: A curved base sitting on a straight natural lash can leave a gap at the bond. A straight base follows the natural lash along the attachment area first, then turns up.
• Monolid eyes: For the same reasons, many artists use straight-base curls when there is little visible lid space above the lashes.

Our Lash Curl Guide compares all eight curls, from J to LC. This article zooms in on the three straight-base options.

L curl lashes have a straight lower section and then a pronounced turn upward. Of the three, L curl lash extensions give the most visible change of direction.

• The look: Open, angular and directional. From the front, the eye looks lifted; from the side, you can see a clear corner where the extension turns.
• When to use it: Straight or downward-growing lashes that need a strong correction, hooded eyes where you want the lift to read clearly, and bold, open styles.
• What to watch: Because the turn is sharp, check the side view as well as the front. A client who only knows front-view photos may be surprised by the profile.
• Where to find it: The L/M/LC Matte Black tray in 0.03, 0.05 and 0.07 mm, and the 0.05 Ultra Black Special Curl tray in Mix 8–16 mm.

If a client wants the open look of an L but finds the side view too sharp, try an LC on the next fill instead of dropping back to a C. The base stays straight, so the lift still clears the lid.

LC curl lashes join a straight base to a curved upper section. Think of LC as a bridge between straight-base curls and the conventional C family.

• The look: Lifted, with a rounder and softer finish than L. From the front it reads closer to a C or CC.
• When to use it: The client needs a straight base for their lid or lash direction but wants a softer, more classic curve. LC is also a natural choice when you blend special curls with C or CC curls in one set, because the upper section is already curved.
• What to watch: On very straight or downward lashes, LC may give less correction than L. Compare both on the first appointment if you are unsure.
• Where to find it: LC curl lashes are on the L/M/LC Matte Black tray and the Ultra Black Special Curl tray.

M curl lashes also start with a straighter lower section, but the transition into the lift is smoother than an L.

• The look: Lifted and elongated, with a more gradual line from base to tip.
• When to use it: You want a straight-base lift with a less angular profile than L, or a longer, stretched look through the outer part of the eye.
• What to watch: M and LC can look similar from the front. The difference shows from the side: LC finishes with a rounder curve, M with a smoother upward sweep.
• Where to find it: M curl lashes are on both the L/M/LC Matte Black tray and the Ultra Black Special Curl tray.

The Ultra Black Special Curl tray also carries LD, LJ and LB, three more variations on the straight-base L shape. Compare them on the tray against your usual L, LC or M before you use them on a client.

Look at the client with their eyes open, from the front and the side, before you choose. A few signs point one way or another:

• The lid fold covers the base of the lashes when the eyes are open. Start with a straight-base curl: L for the clearest lift, LC or M for a softer one.
• The natural lashes grow straight or point down. L gives the strongest correction; LC suits clients who want a rounder finish.
• The client likes the lifted look but says their last set looked "too sharp." Move from L to LC or M.
• The client wants an elongated, lifted look through the outer corner. Try M curl in the outer zones.
• The natural lashes already point forward or up and the lid is not hooded. A conventional C or CC may be all you need.

Curl is only one part of the decision. Diameter and length still need to suit the natural lash; our 0.03 vs 0.05 vs 0.07 guide covers the volume diameters that these special curls come in.

You can build a whole set in one special curl, or use it only where the eye needs it.

• Full set: Simple and consistent. A good choice when the whole lash line is straight or the hood runs across the full lid.
• Mixed with C or CC: Place the special curl where the lid covers the lashes most, and keep a conventional curl where it does not. Keep the diameter the same across the set so the texture stays even.
• Length after a curl change: A curl with more lift can look shorter from the front than a straighter curl of the same length. When you switch curls, check the effect and adjust the length one millimeter at a time.
• Classic, hybrid or volume: Our L, M and LC trays come in 0.03, 0.05 and 0.07 mm, so they suit volume and hybrid work. If you mainly do classic sets, compare a 0.07 mm special curl with your usual classic diameter before building a full set with it; it will look finer than 0.15 mm. See Classic vs Volume Lash Extensions for the diameter ranges.
• Client records: Note the curl in each zone. Special-curl sets are hard to match at a fill without it.

To try special curls without buying a full range, start with one Mix 8–16 mm tray in the diameter you use most. Once you know which curl and lengths you reach for, add single-length trays.