Suitable BOB Wig Lengths for Square Faces  

The key facial feature of a square face is that the forehead, cheekbones, and jawline are roughly the same width, with a sharp and distinct jawline. When choosing the length of a BOB Wig, the core goal is to soften the rigid lines of the jaw using the "vertical lines" or "local layering" of the hair strands, while avoiding lengths that are too short or too long—these can exaggerate the heavy "square contour" of the face. Below are recommended BOB Wig lengths for square faces, along with their fitting logic and tips to avoid mistakes:  

 1. Top Choice: Chin-Length to 2-3cm Below the Earlobes (Classic Short BOB)  
Fitting Advantages  
This length is the "golden safe zone" for square faces:  
1. Softens Jaw Angles: The ends of the hair just cover half of the jawline. This not only uses the soft hair tips to weaken the "sharp lines" of the jaw but also prevents longer hair from clinging tightly to the cheeks (which would make the jaw contour more prominent).  
2. Balances Facial Proportions: Being level with the chin, it visually widens the face horizontally (avoiding a "narrow and long" look for square faces). At the same time, the natural drape of the hair makes the width proportions of the forehead, cheekbones, and jaw more harmonious.  
3. Versatile Styling Options: It pairs well with a slightly layered Blunt Bob or an asymmetrical side-parted Bob. The side-part design allows one side of the hair to cover the area below the cheekbones, further softening the "square feel" of the face. Layers add lightness to the hair, preventing it from clinging to the face and looking heavy.  

Suitable Scenarios  
Ideal for daily commutes, office settings, and gentle-style looks—especially for square faces with a noticeable jawline but non-prominent cheekbones.  

 2. Second Choice: 3-5cm Above the Shoulder Line (Mid-Length LOB, Long BOB)  
Fitting Advantages  
If you prefer slightly longer hairstyles, a LOB length above the shoulders is more user-friendly. Its core benefits include:  
1. Adds Vertical Softness: Slightly longer than a classic BOB, the hair can naturally drape down to just above the collarbone. The "longer vertical lines" visually elongate the neck, while the jawline is "half-hidden" by the hair strands, reducing rigidity.  
2. Accommodates Hair Volume and Layers: It works well with "high-layered cuts" (where the hair ends gradually lengthen from below the cheekbones). This adds fullness to the hair on both sides of the face, preventing it from clinging to the skin—perfect for square faces with thin hair. The voluminous hair creates a "visual buffer" below the cheekbones, softening the "straight lines" of the face.  
3. Flexible Styling: It can be styled into a half-up top knot, side braids, or lightly curled with a curling iron. The "curved lines" further counteract the "straight contours" of a square face, suiting gentle, lazy, French, and other styles.  

Suitable Scenarios  
Great for those who enjoy versatile hairstyles or have a wide jawline but want to maintain a "feminine, soft vibe."  

 3. Proceed with Caution: 1-2cm Above the Earlobes (Extra-Short BOB)  
Fitting Conditions (Need to Meet at Least 2)  
An extra-short BOB (slightly longer than a pixie cut) is "risky" for square faces. Choose it carefully only if you meet the following conditions:  
1. Non-Sharp Jawline: If your jawline is "wide" rather than "sharply angular," an extra-short BOB can shift focus away from the jaw by exposing the ears and neckline, avoiding the heaviness caused by hair clinging to the jaw.  
2. Paired with Obvious Layers/Fullness: It must feature "voluminous roots + textured, chopped ends." The volume at the top increases the "vertical height" of the head, balancing the width of the face. Textured ends prevent the "one-length cut" (straight lines) from emphasizing the square contour.  
3. Side-Part or Angled Bangs: Match it with a deep side part (covering 1/3 of the forehead) or angled bangs. The "curved lines" of the bangs counteract the "straight width" of the forehead, avoiding a "more square" look that full straight bangs might create.  

Warning  
Avoid this length if you have a sharp jawline, thin hair, or a short neck—it will expose the jaw angles, make the head look "flat and wide," and amplify the rigid feel of the face.  

 4. Absolute Avoidance: 2 Length Categories  
1. Too Short (Above the Earlobes, Close to a Pixie Cut)  
An overly short length fully exposes the jawline and neck, directly exaggerating the "square contour" of the face. It also tends to make the head look "small and narrow," creating an imbalanced proportion with the face width and giving a serious, overwhelming impression.  

2. Too Long (Past the Shoulders, Below the Collarbone)  
Hair longer than the shoulders gains more weight and easily clings to the cheeks and jaw, making the "square jaw contour" more distinct. Additionally, the overly long vertical lines elongate the face, worsening the "wide + long" proportion of a square face and making the face look bulky.  

 Bonus: "Golden Matching Formula" for Lengths on Square Faces  
To maximize the modifying effect after choosing the right length, pair it with these details:  
- Bangs: Prioritize side-parted angled bangs or wispy bangs (reaching the end of the eyebrows). Avoid full straight bangs—they tend to shorten the forehead and make the face look "squarer."  
- Layers: Whether it’s a short BOB or a LOB, add "light layers" (no more than 3 layers). Avoid "one-length cuts" (straight lines)—layers add lightness to the hair and soften the "straight contours" of a square face.  
- Curl: Slightly curl the ends inward (1cm curl with a curling iron). The inward-turned ends "frame" the jaw, creating a softer look than straight ends.  

In short, the core of choosing a BOB Wig length for a square face is to "neither expose nor cling tightly." Let the hair naturally drape between the chin and shoulder line, using length and lines to soften angles while balancing facial proportions—this will help you create a stylish and flattering look.