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Lesson 4

Alternative Cleavage: Exploring Garment Cuts and Styles

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Hello! Welcome to your fourth lesson in the "Foundations of Cleavage Styling" module.

In our last session, we explored the physics of fabric, analyzing how weight, drape, and stretch are not just aesthetic choices but functional properties that dictate how a neckline frames the bust. We saw how a fluid, high-drape silk creates a soft cascade, while a structured, heavyweight knit can sculpt and define.

Today, we shift our focus from framing traditional cleavage to exploring its alternatives. The learning outcome is to identify specific garment cuts, armhole designs, and hem styles designed to showcase alternative cleavage (side-boob and underboob). We will move beyond the V-neck and scoop neck to analyze how the strategic removal of fabric—through cuts in the hem or armhole—can create deliberate and impactful visual effects. This is a lesson in negative space, treating the cut of the garment as a powerful tool for shaping and revealing.

1. The Underboob: Engineering the Lower Curve

Underboob, or bottom-cleavage, is the aesthetic practice of revealing the lower curve of the breast. This is achieved almost exclusively through the manipulation of a garment's hem style. The two primary methods are the cropped hem and the strategic cut-out.

Let's look at some examples to get a clear picture.

Underboob Cleavage in Various Garment Styles
This image shows four variations of the underboob look. Notice how each garment's hemline is the critical design feature, whether it's a simple cropped t-shirt or a more structured top with a specific shape.

To understand the specific cuts that create this look, we'll turn to a resource that breaks down the trend.

Underboob-Baring Outfits Are 2023's Latest Trend

The article 'Underboob-Baring Outfits' from Women.com offers a practical guide to the garment cuts that facilitate this style.

Please read two sections: Start with the section titled 'Styling underboob day-to-day'. Focus on its analysis of form-fitting tops, bodysuits, and front cut-outs. Then, read 'Go for an underboob swimsuit'. This part is particularly relevant given your background in bikini design, as it shows how these principles are applied in a structured, high-performance context.

As the article illustrates, achieving an intentional underboob look is a matter of precise garment engineering:

  • The Cropped Hem: This is the most straightforward approach. A "micro" crop top, a shrunken t-shirt, or a cropped sweater whose hem ends just above the inframammary fold (the crease beneath the breast) will naturally create this effect. The success of this style depends heavily on the fit and the fabric's stretch; a tighter fit prevents the garment from riding up further than intended.

  • The Under-Bust Cut-Out: This is a more deliberate design feature. Instead of raising the entire hem, a "window" is cut out of the fabric directly below the bust. As noted in the article, this is often seen in:

    • Bodysuits: The bodysuit structure provides an anchor, holding the fabric taut and ensuring the cut-out stays perfectly in place.
    • Form-fitting Tops: A snug fit is essential to keep the edges of the cut-out lying flat against the torso, defining the shape of the revealed curve.
    • Swimwear: Bikini tops with under-bust cut-outs are a classic example. Your experience designing swimwear will tell you that the non-stretch or limited-stretch band at the very bottom is crucial for providing support while the cut-out provides the visual effect.

2. The Side-Boob: The Architecture of the Armhole

Side-boob refers to the display of the lateral portion of the breast, typically visible from the side profile. This effect is almost entirely dictated by the armhole (or armscye) design. A standard armhole is cut to fit snugly around the shoulder and underarm, but for side-boob, the armhole is intentionally enlarged and lowered.

Side-Cleavage Examples: Bralette, Halter Dress, and Wide Armhole Top
This collage demonstrates three distinct ways to achieve side-boob. On the right, the deep-cut armhole of the white dress is the key feature. In the center, the fishnet bralette's minimal side coverage achieves the effect. On the left, the wide armhole of the tank top is the mechanism at play.

Let's examine the specific garment styles that use this architectural approach.

These Side Boob Outfits Are Celebrity Approved

The article 'These Side Boob Outfits Are Celebrity Approved' from I AM & CO provides an excellent visual catalog of the cuts and styles used to create this look.

Please engage with this resource in two steps: First, read the section under the heading 'How to Pull off the Side Boob'. It identifies the key garment archetypes. Next, scroll through the list under 'Side Boob Tops and Dresses'. You don't need to read every detail, but observe the image of each item (e.g., Cowl Neck Bodysuit, Crochet Halter, Urban Renewal Tank Top, Tie Side Vest) and read its title to understand the variety of cuts that can be used.

From this resource, we can systematically categorize the garment cuts that produce side-boob:

  • Deep-Cut Armholes: This is the defining feature of "muscle tees" and many modern tank tops. The armhole is dropped significantly, sometimes extending down to the waist. The "Take the Plunge Tank" from the article is a prime example of this cut. The lower the armscye, the more of the side torso and bust is revealed.

  • Halter Tops: By design, many halter tops consist of two pieces of fabric covering the front of the breasts and tying at the neck, leaving the sides almost entirely open. The "Deon Crochet Cropped Halter Top" illustrates how the triangular cut naturally creates side exposure.

  • Open-Sided Garments: This is the most extreme version, where the front and back panels of a top are not stitched together at the side seams. Instead, they are connected with ties, straps, or left completely open. The "White Cotton Tie Side Vest Top" from the article is a perfect illustration of this deconstructed approach.

  • Backless and Cowl-Neck Designs: Garments like the "Cowl Neck Lace-Up Bodysuit" often feature deep armholes as part of a larger design that also includes an open or backless element. The draped fabric of a cowl neck can be cut widely, contributing to the side view.

In all these cases, the principle is the same: the garment's structure is intentionally reduced at the sides to create a specific frame for the bust when viewed from an angle.

Conclusion

Today we dissected the structural principles behind alternative cleavage. Where traditional cleavage is framed by the neckline, underboob and side-boob are created by manipulating other key lines of a garment's pattern.

Key Takeaways:

  • Alternative cleavage is created by designing with negative space—the parts of the garment that are cut away.
  • Underboob is a function of hem style. It is achieved either with a high-cropped hemline or a deliberate under-bust cut-out, often stabilized in a bodysuit or form-fitting top.
  • Side-boob is a function of armhole design. It is achieved with deeply cut armholes, halter-neck constructions, or garments with open, tie-side designs.

In this lesson and the last, we've focused on how fabric and cut frame the bust. However, some garments go a step further and provide their own shaping. In our next lesson, we will analyze how inherent garment structure (e.g., boning, corsetry, ruching) can provide bust shaping and support, adding the final foundational layer to our understanding before we begin applying these principles to specific outfits.