How to Choose the Right Size Mulberry Silk Bonnet for Long Hair

How to Choose the Right Size Mulberry Silk Bonnet for Long Hair

Table of Contents

Last Updated: September 29, 2026

Why Size Matters for Mulberry Silk Bonnets

Learning how to choose the right size mulberry silk bonnet for long hair is not just about comfort. It's about protecting your investment and preserving your hair's health night after night.

A bonnet that's too loose slides off while you sleep. Your hair loses contact with the silk, and friction returns. A bonnet that's too tight creates tension on your scalp, which can lead to stress on your hairline and edges over time. The sweet spot? A secure fit that holds your bonnet in place without pulling.

Many women struggle with sizing. They buy a bonnet based on generic measurements, only to find it doesn't work for their specific hair volume or sleeping style. The difference between a bonnet that becomes part of your nighttime ritual and one that ends up in a drawer often comes down to one thing: proper sizing from the start.

Woman with long textured hair carefully measuring head circumference with a soft measuring tape, showing proper placement around forehead and back of head with natural morning light
Woman with long textured hair carefully measuring head circumference with a soft measuring tape, showing proper placement around forehead and back of head with natural morning light
Pro Tip Most women underestimate their head circumference by half an inch. Measure twice, in different locations on your head, and use the larger measurement.

Measure Your Head Circumference for the Right Fit

Step-by-Step Measurement Guide

Your head circumference is the foundation for how to choose the right size mulberry silk bonnet for long hair. This single measurement determines whether your bonnet will stay secure or slip throughout the night.

Here's how to measure accurately:

  1. Get a soft measuring tape. Fabric measuring tapes work best. Avoid rigid rulers or metal tapes.

  2. Find your starting point. Place the tape at the center of your forehead, just above your eyebrows.

  3. Wrap around your head. Pull the tape around the back of your head at the widest point. Keep it snug but not tight.

  4. Note the measurement. Write down the number where the tape meets. This is your head circumference.

  5. Measure again. Take a second measurement slightly higher on your head, across the crown. Compare the two numbers.

  6. Use the larger measurement. This gives you the most accurate fit, especially if you have thick or voluminous hair.

Most women find their head circumference falls between 21 and 23 inches.

Adjusting for Long Hair Volume

Long hair takes up space inside your bonnet. This means you need to account for the volume your hair creates, not just your scalp size.

Hair volume varies based on texture and thickness. Coily and textured hair tends to have more volume than straight hair of the same length. Fine hair may have less volume despite its length.

Here's the adjustment:

  • Fine or thin hair: Use your head circumference measurement as-is.
  • Medium hair: Add 0.5 inches to your head circumference.
  • Thick or coily hair: Add 1 to 1.5 inches to your head circumference.

This extra space prevents your bonnet from feeling tight or creating pressure on your scalp while you sleep.

Watch Out Bonnets that are too tight can cause tension alopecia, gradual hair loss from sustained pulling on the hairline and edges (the American Academy of Dermatology). Choose a size that feels comfortable from the first wear.

Understanding Momme Weight and Fabric Quality

Momme (mm) is the weight measurement for silk fabric. Higher momme means denser, thicker, more durable silk. It's the standard used across the silk industry to indicate quality and longevity.

At 22 momme, you get a fabric that:

  • Maintains its softness through repeated washing
  • Provides genuine friction reduction for your hair
  • Breathes naturally to prevent heat buildup
  • Lasts for years with proper care

Mulberry Silk vs Satin for Hair Protection

The comparison between mulberry silk and satin comes up constantly. Both feel smooth, but they work very differently for your hair.

For long hair, the difference becomes obvious within weeks:

  • Mulberry silk maintains moisture in your hair, reduces frizz, and protects your curl pattern or wave texture
  • Satin can create a slippery environment that leads to more breakage and moisture loss over time
Key Takeaway Mulberry silk is a natural protein that mimics your hair's needs. Satin is a synthetic weave that mimics the look but not the function.

Choosing the Right Bonnet for Your Hair Volume and Texture

Not all bonnets fit all hair types equally. Your hair texture and volume determine which bonnet design works best for you.

Thick and Coily Hair

Thick and coily hair needs a bonnet with generous interior space and a secure fit that won't slip. Coily textures create significant volume, so you need extra room inside the bonnet to accommodate your hair without compression.

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Look for:

  • A bonnet sized at least 1 to 1.5 inches larger than your base head circumference
  • Extended mulberry silk ties rather than elastic bands (elastic creates tension and can cause breakage)
  • Double-layer construction for durability
  • A bonnet depth that accommodates your coils without flattening them

Fine or Thinning Hair

Fine hair needs a lighter touch. A bonnet that's too tight or made from heavy fabric can cause tension on your delicate strands and stressed scalp.

Prioritize:

  • A bonnet that fits snugly without any pulling sensation
  • Lightweight mulberry silk (19-22 momme is ideal)
  • Soft, smooth ties that won't catch on fine strands
  • A design that won't compress your hair into knots

Wavy and Textured Hair

Wavy and textured hair needs a bonnet that preserves your wave pattern without flattening it. You want enough space for your waves to maintain their shape while staying secure throughout the night.

Choose:

  • A bonnet with adequate interior depth to hold your waves
  • Mulberry silk ties that won't disrupt your wave pattern
  • A size that's snug enough to prevent slipping but loose enough to preserve texture
  • A bonnet designed to move with your hair, not against it

Adjustable Straps and Elastic Tension: What to Look For

The way your bonnet secures to your head matters as much as the size itself. Two bonnet options might have the same head circumference, but their closure systems work very differently.

When evaluating a bonnet's closure system, ask yourself:

  • Does it create continuous pressure on my scalp?
  • Will it stretch out and lose its grip over time?
  • Does it work with my hair texture or against it?
  • Can I adjust it to feel comfortable without feeling tight?
Pro Tip Test your bonnet's tightness by sliding one finger under the tie or elastic. You should have just enough room for your finger to fit comfortably. If it's tighter or looser than that, adjust before bed.

How to Wash Mulberry Silk Bonnets for Long-Term Durability

Your bonnet's lifespan depends entirely on how you care for it. Proper washing preserves the silk's natural properties and keeps your bonnet looking and feeling luxurious for years.

The washing process:

  1. Fill a basin with cool water
  2. Add a small amount of silk detergent
  3. Submerge your bonnet and gently agitate for 2-3 minutes
  4. Rinse thoroughly under cool running water until soap is gone
  5. Gently squeeze out excess water (never wring)
  6. Lay flat on a clean towel to dry

Extra-Long Silk Sleep Caps for Wigs and Extended Hair

Some hair situations call for a bonnet larger than standard sizing. If you wear wigs, extensions, or have exceptionally long hair, an extra-long silk sleep cap becomes necessary.

  • Full-coverage wigs with extended length

  • Hair extensions that add volume and length

  • Natural hair that extends well past shoulder length

  • Protective styles with significant bulk

  • Genuine Grade 6A mulberry silk at 20+ momme

  • Adjustable closure that doesn't create tension

  • Double-layer construction for durability

  • Proper depth to accommodate your hair without compression

Measurement Factor What to Do Why It Matters
Head circumference Measure twice at different heights; use the larger number Ensures your bonnet stays secure without slipping
Hair volume adjustment Add 0.5-1.5 inches based on hair thickness Prevents tension on scalp while accommodating your hair
Momme weight Choose 20-22 momme for durability and breathability Affects how long your bonnet lasts and how well it protects
Closure system Prefer silk ties over elastic bands Prevents tension alopecia and maintains consistent fit
Hair texture Size up for coily/thick; size to fit for fine hair Protects your specific hair type from breakage

Frequently Asked Questions

How do I know what size mulberry silk bonnet to get for long hair?

Measure your head circumference with a soft measuring tape placed around your forehead, ears, and the back of your head where a bonnet would sit. For long hair, add 0.5 to 1 inch to account for hair volume underneath. Most mulberry silk bonnets fit head sizes from 20 to 24 inches. The Whispered Crown™ features adjustable mulberry silk ties that let you fine-tune the fit without elastic tension, making it adaptable across different head sizes and hair volumes.

What is the difference between mulberry silk vs satin for hair protection?

Mulberry silk is a natural protein fiber that naturally regulates temperature, reduces friction, and allows your hair cuticles to retain moisture. Satin is a synthetic weave that mimics silk's smoothness but lacks mulberry silk's breathability and hypoallergenic properties. Grade 6A mulberry silk at 22 momme, like The Whispered Crown™, offers superior durability and hair protection compared to satin, making it ideal for long-term nighttime hair care and preserving your natural oils.

Does hair length really affect how I should size a bonnet?

Yes. Long hair creates additional volume underneath a bonnet, requiring a slightly larger fit than what your head circumference alone suggests. If you wear your hair in protective styles like braids or twists, add 1 to 1.5 inches to your base measurement. Bonnets with adjustable features, like The Whispered Crown™'s extended silk ties, accommodate this variation without creating tension alopecia or scalp discomfort.

How do I care for a mulberry silk bonnet to make it last?

Hand wash your mulberry silk bonnet in cool water with a gentle silk-specific detergent, then air dry flat or on a bonnet form. Avoid wringing, twisting, or machine washing, which damages the silk fibers. Store in a breathable cotton bag away from direct sunlight. Proper care preserves the fabric's natural temperature-regulating properties and ensures your bonnet remains soft and durable for years, making it a true heirloom piece worth inheriting.

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