If you hear the phrase "eyebrow extensions" and immediately picture impossibly long eyelash extensions, just glued on a bit further north, well, don't (despite what a hilarious image that is). Long, flowing eyebrows remain firmly not a thing. Instead, brow extensions do are a procedure to fill in gaps and enhance eyebrow shapes for a more polished and defined look.

But that begs the question: do you really need eyebrow extensions? How do they work? How much do they cost? And how long do eyebrow extensions last? Below, with the help of the co-owner of Chicagoland's Occhi Lashes, we outlined the basics of this trending service so you know what to expect before you hang up your tweezers for good.

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How much do eyebrow extensions cost?

That depends on how much work you'd like done. If you just want a little extra filling, prices can run as low as $50, but if you want more done or a more dramatic look, the price can shoot up to $200 or so. Of course, no matter what you're getting done you can cut the price dramatically by shopping for a good deal on our site.

How long do eyebrow extensions last?

The answer to this question largely depends on the type of extensions you get and your daily habits. Extensions applied directly to the natural brow hairs will fall out naturally with the hair's shedding cycle, typically anywhere from 6 to 16 days. Of course, if you're the type of person who routinely rubs their eyes or touches their face, don't be surprised if they fall out quicker.

Extensions applied to the skin fall out even quicker. This is because technicians usually use a gentler, less durable glue when applying directly to the skin, so as to avoid breakouts and allergic reactions. For this reason, extensions affixed to the skin may be better suited for special occasions than everyday wear.

Why should you try them?

You can thank celebs like Kim Kardashian, Cara Delevingne, and Angelina Jolie for bringing the fuller brow look back. But you don't have to be a celebrity (or want to look like one) in order to benefit from brow extensions.

The main thing they can do? Tweak your brow shape. Your natural eyebrow shape is just a starting point. Extensions can give you a higher arch, a longer tail, more or less curve—you name it. (Don't worry: stylists hold stencils up to your face to help you translate your mental picture into a concrete plan.)

They're also great for filling in bare spots. Because of this, brow extensions are a great option for people who have overtweezed, those with age-related brow loss, or those with medical-related brow loss caused by chemotherapy, radiation, or trichotillomania.

How do eyebrow extensions work?

Turns out getting perfect eyebrows is actually pretty quick and painless, and appointments rarely go beyond 30–45 minutes.

Here are the typical steps in the process:

1. Clean and prep the brows. And though it may be counterproductive, don't be surprised if they also pluck away any stray hairs falling outside the brow line. This is all part of establishing the perfect eyebrow shape.

2. Outline your new brow shape. Don't be alarmed if the drawn or stenciled line looks cartoonish, as it's merely a guide. The technician will know how to place the brows to make the look seem as natural as possible.

3. Affix the extensions. With a surgical-grade adhesive, technicians will apply the extensions one-by-one to the natural brow hairs or directly to the skin, depending on your needs. Keep in mind, your finished brows won't look perfectly symmetrical. But this is a good thing, since natural brows aren't perfect either and a little asymmetry will help make them more genuine.

This article was originally written by staff writer Mae Rice, and has since been updated by our editors.