What Is a Square Jaw?

A square jaw is a broad, angular lower face shape caused by a prominent mandibular angle. It’s often described as a “boxy” or “masculine” appearance, with wide jaws that extend outward beyond the cheekbones.
This facial structure is common among certain ethnicities and may create a strong, heavy look that some individuals feel doesn’t match their desired appearance.

A square jaw can also make the face look shorter or wider, and in some cases, it can be mistaken for a buildup of muscle (masseter hypertrophy) rather than bone.

What Is Square Jaw Surgery?

Square jaw surgery, also known as mandibular angle reduction or V-line surgery, is a bone contouring procedure designed to slim and reshape the lower face by removing excess bone from the mandibular angle.

At Seoul Cheil Plastic Surgery, square jaw surgery is performed with precision and artistry:

• Incisions made inside the mouth for a scar-free appearance
• Osteotomy (bone cutting) of the prominent jaw angle
• Contouring the jawline and lower mandible for a smoother, more tapered V-line shape
• Surgical time: approximately 1.5 to 2.5 hours under general anesthesia
• Post-op care includes swelling management and special dietary guidelines for optimal healing

The result? A slimmer, more balanced facial contour that looks natural, not overdone.

Why Combine With Other Procedures?

Square jaw surgery is often combined with:

• Cheekbone reduction for overall facial slimming
• Chin surgery (genioplasty) to achieve the ideal lower face proportions
• Masseter Botox for patients with both bone and muscle bulk
• Buccal fat removal for a sharper cheek contour

Combining procedures allows for a comprehensive facial contouring plan, ensuring a harmonious and proportionate look.

Key Characteristics of a Square Jaw

• Wide, broad lower face
• Prominent jaw angles that extend outward
• Lack of definition along the jawline
• Heavy, bulky appearance from the front and side
• Difficulty achieving a slim V-line profile with makeup or hairstyles

Can Jawline Slimming Be Done Without Surgery?

For mild cases caused by muscle hypertrophy, Botox injections can temporarily reduce jaw width. However, Botox cannot reshape the bone structure.
For true bony square jaws, surgical reduction is the only permanent solution for lasting results.

Square Jaw Surgery at Seoul Cheil Plastic Surgery

Seoul Cheil Plastic Surgery is one of Korea’s most trusted names in facial bone contouring, with extensive experience and cutting-edge techniques.

Why choose Seoul Cheil:

• Over 20 years of expertise in jaw contouring
• Customized approach for each patient’s bone structure
• Scar-free, intraoral surgical technique
• Comprehensive post-op care, including swelling control and dietary guidance
• English-speaking staff to assist international patients



Ready to achieve a slimmer, more elegant jawline?
Square jaw surgery at Seoul Cheil Plastic Surgery can help you create the V-line look you’ve always wanted—balanced, feminine, and confident.

Book your consultation today and start your transformation!