When it comes to choosing the perfect hair extensions, length matters just as much as color, texture, or style. Whether you're a first-time buyer or a hair extension lover looking to switch things up, deciding on hair length can feel confusing. Each length offers a different vibe, and the best choice depends on your personal style, lifestyle, and hair goals.
In this blog, we’ll break down the differences between 16-inch, 18-inch, and 20-inch hair extensions to help you find the length that fits you best.
1. Understanding Hair Extension Length
For those who buy hair extensions for the first time, you may not understand this concept. But don't worry, we will introduce this hair extension length first.Hair extension length refers to the measured size of hair extensions from the top (where they attach to your natural hair) to the ends. Hair extensions are measured when the hair is straight, but if you choose a curly or wavy texture, the hanging length will appear shorter. Before diving into the comparison, it’s important to understand what the measurements mean.
2. How Long Is 16-Inches Of Hair Extensions?
16 inches of hair extension = ~ 40 cm (from root to tip (unstretched).16-inch hair extensions typically reach collarbone to shoulder length when installed, but depending on your natural hair’s starting point.
💖Best For:
Women who want a fuller version of their natural length.
Those with shorter necks or petite frames.
A professional, low-maintenance hairstyle.
✅Pros:
Light and comfortable.
Easier to manage and style.
Blends seamlessly with medium-length natural hair.
✨Style Vibe:
Think classic blowouts, sleek bobs, or soft waves. 16-inch hair adds body without being overwhelming. It’s also a great choice for layered cuts or blunt ends.
3.16 Inch Hair Extensions Before And After
16-Inch Hair Extensions offer a natural yet voluminous look, perfect for effortless everyday styling. The front typically grazes the collarbone or rests just below the shoulders, framing the face beautifully for a soft, face-flattering effect. From the back, the length adds noticeable fullness and bounce, blending seamlessly with medium-length natural hair while keeping maintenance low.
4. How Long Is 18 inches Of Hair Extensions?
18 inches of hair extensions =~45 cm (from root to tip when laid flat).18-inch hair extensions typically reach mid-back length (around the bra strap area) when installed on average-height individuals (5'4"–5'8").
💖Best For:
Those who want extra length but still want a natural appearance.
Everyday styling with a bit of glam.
A versatile look that can go from work to weekend.
✅Pros:
Adds both length and volume.
Works well with most hairstyles (ponytails, curls, straight).
Still easy to maintain.
✨Style Vibe:
With 18 inches, you can wear high ponytails, long curls, beach waves, or a straight sleek style. It offers versatility while still looking realistic and manageable.
5.18 Inch Hair Extensions Before And After
18-inch hair extensions from the front frame the face beautifully, enhancing layers or curtain bangs for a soft, face-flattering effect. The back reaches just below the shoulder blades, creating full, flowing waves or sleek straight styles. This length offers a balanced blend of volume and manageability, making it ideal for both everyday wear and special occasions.
6. How Long Is 20 inches Of Hair Extensions?
20 inches = 50 cm from top to tip when laid straight.20-inch hair extensions typically reach mid-back to lower back (around bra strap length) when installed, depending on your height and natural hair length.
💖Best For:
Special events, photo shoots, or glam looks
Tall women or those who want dramatic length
Long, flowing styles like curls, waves, or layers
✅Pros:
Great for bold transformations
Makes every hairstyle look fuller and more dramatic
Works well for updos and creative styling
✨Style Vibe:
Think red carpet waves, high-volume curls, and eye-catching length. 20-inch extensions are a favorite for influencers and anyone wanting a gorgeous, full-length hairstyle.
7.20 Inch Hair Extensions Before And After
20-inch hair extensions from the front they create a dramatic frame around the face, enhancing features with cascading layers or sleek strands that flow past the shoulders. From the back, the extensions reach mid-to-lower back (around bra-strap length), delivering a mermaid-like effect. This length balances elegance and versatility, making it ideal for special occasions or bold everyday styles. For best results, pair with layered cuts to ensure seamless blending and movement.
8. Key Differences: 16-Inch Vs 18-Inch Vs 22-Inch Hair Extensions
|
Feature |
16-Inch Hair Extensions |
18-Inch Hair Extensions |
20-Inch Hair Extensions |
|
Length |
Past shoulders |
Mid-back |
Lower back |
|
Weight |
Light |
Moderate |
Heavy |
|
Face Shapes |
Round, petite |
Oval, heart |
Oval, long |
|
Best For |
Subtle volume |
Classic length |
Dramatic glam |
|
Tangle Risk |
Low |
Medium |
High |
|
Price |
$80–$150 |
$120–$200 |
$150–$250 |
|
Maintenance Level |
★★☆☆☆ |
★★★☆☆ |
★★★★☆ |
9. How To Choose The Right Length For You?
Your Height: If you're petite, longer hair may feel heavier or look even longer on you.
Your Natural Hair Length: Extensions should blend well. If your hair is short, 16” might look more natural.
Maintenance Level: Longer hair takes more time to wash, detangle, and style.
Occasion: For weddings, parties, or glam photoshoots, longer hair adds more drama. For everyday use, mid-length is often ideal.
10. Styling And Caring Tips for Different Lengths
16": Perfect for beachy waves or sleek bobs.
18": Great for half-up styles or voluminous curls.
20"+: Best for Hollywood waves, braids, or high ponytails.
◆Detangle gently (start from ends, use a wide-tooth comb).
◆Sleep in a loose braid to prevent knots.
◆Hydrate often (silicone-free serums for shine).
11. FAQs
Q: Do extensions look shorter when installed?
A: Yes! If your natural hair is short, extensions may appear 1–2 inches shorter once blended.
Q: Can I cut my extensions to customize the length?
A: Yes—but only cut after installation for even blending.
Q: What’s the most popular extension length?
A: 18 inches (mid-back)—it’s versatile for both casual and glam looks.
Sunber Hair Tip:
At Sunber Hair, we offer a variety of 16", 18", and 20" human hair extensions and wigs in different textures—straight, body wave, curly, kinky, and more. Whether you're going for a natural daily style or a bold transformation, we have the perfect length and texture to match your needs.Don’t forget to check out our bundles with closure deals, ready-to-ship lace front wigs, and glueless options for a quick, secure fit!
Final Thoughts
Choosing between 16, 18, or 20 inches isn’t just about length—it’s about confidence, comfort, and the look you want to achieve. Start by imagining your ideal hairstyle, then match that vision with the right extension length. No matter which one you choose, the most important thing is to feel beautiful and empowered every time you wear it.
Still unsure? Reach out to Sunber Hair’s customer service team for a personalized recommendation. We’re always here to help you shine.
