If you have shopped for a silk pillowcase, sheets, pajamas, or other silk products, you have probably seen numbers such as 19 momme, 22 momme, or 25 momme.
But what does momme actually mean?
Momme is a traditional measurement of silk fabric weight. It tells you how much silk fabric weighs over a standardized area and is commonly used to compare the density and substance of different silk fabrics.
In practical terms, a higher momme number usually means a heavier, denser, and more substantial silk fabric.
But there is one important rule to remember:
Higher momme does not automatically mean better silk.
The right momme depends on how the silk will be used, while overall quality also depends on the fiber, weave, construction, finishing, and workmanship.
What Does Momme Mean in Silk?
Momme—usually abbreviated as mm—is a traditional unit used to measure the weight of silk fabric.
Technically, momme is based on the weight in pounds of a piece of silk measuring 45 inches wide by 100 yards long.
For easier comparison:
1 momme is approximately 4.34 grams per square meter.
That means approximately:
- 19 momme = 82.5 g/m²
- 22 momme = 95.5 g/m²
- 25 momme = 108.5 g/m²
- 30 momme = 130.2 g/m²
The calculation is useful, but shoppers usually do not need to convert momme into grams.
The important takeaway is simple:
The higher the momme, the more silk fabric weight there is within the same area.
Is Momme the Same as Thread Count?
No.
Momme and thread count measure different things.
Momme measures fabric weight.
Thread count typically refers to the number of threads woven into a given area of fabric and is more commonly used when discussing cotton bedding.
For silk, momme is a more useful specification because it tells you about the physical weight and density of the silk fabric.
This is also why a silk pillowcase advertised only with a very high “thread count” but without clear information about fiber content and momme should be evaluated carefully.
Does Higher Momme Mean Better Quality?
Not necessarily.
Higher momme generally means the fabric is:
- Heavier
- Denser
- More opaque
- More substantial in the hand
- Potentially more resistant to everyday wear
- Usually more expensive because more silk is used
But momme does not tell you:
- Whether the fabric is genuine silk
- What type of silk fiber is used
- How well the fabric was woven
- Whether the seams are well constructed
- What dyes or finishes were used
- Whether the finished product suits its intended use
For example, a well-made 22 momme Mulberry silk pillowcase may be a better choice for nightly use than a heavier silk product with poor workmanship.
Momme is an important specification, not a complete quality score.
Common Silk Momme Weights Explained
| Momme | Typical Feel | Common Uses |
|---|---|---|
| 6–10 Momme | Very light, delicate, sometimes sheer | Chiffon, scarves, linings |
| 12–16 Momme | Lightweight with more substance | Scarves, blouses, lightweight garments |
| 19 Momme | Light-to-medium, smooth, practical | Pillowcases, sheets, sleepwear |
| 22 Momme | More substantial while remaining soft and fluid | Premium pillowcases, sheets, sleep accessories |
| 25 Momme | Heavier, denser, more substantial | Premium pillowcases and heavier silk bedding |
| 30+ Momme | Very dense and heavy | Heavy silk garments, specialty bedding and furnishings |
These are general ranges rather than strict rules. Different weaves can behave differently at the same momme weight.
19 Momme vs. 22 Momme Silk
For pillowcases, this is one of the most common comparisons.
Both 19 momme and 22 momme can be appropriate for a silk pillowcase.
19 Momme Silk
19 momme silk generally feels:
- Lighter
- More delicate
- Fluid and soft
- Less substantial than 22 momme
It can be a good choice for shoppers who want genuine silk at a lower price or simply prefer a lighter fabric.
22 Momme Silk
22 momme silk uses more fabric weight per area and generally feels:
- Denser
- More substantial
- Less delicate
- More opaque
- Better suited to frequent everyday use
For a pillowcase used every night, 22 momme offers a useful balance between a smooth silk feel and increased fabric substance.
22 Momme vs. 25 Momme Silk
Moving from 22 momme to 25 momme adds even more fabric weight.
A 25 momme pillowcase may feel:
- Heavier
- Denser
- More substantial
- Less delicate
But heavier does not automatically mean more comfortable.
Some shoppers prefer the slightly lighter drape of 22 momme, while others enjoy the heavier feel of 25 momme.
At this point, the decision is increasingly about personal preference, price, and hand feel rather than assuming one number is objectively superior.
What Is the Best Momme for a Silk Pillowcase?
For everyday silk pillowcases, 19 to 25 momme is a practical range to consider.
The most common choices are:
- 19 momme: lighter and usually more affordable
- 22 momme: balanced density, softness, and everyday durability
- 25 momme: heavier and more substantial
There is no universal “perfect” momme.
However, 22 momme is a strong middle ground for a pillowcase used nightly because it adds fabric density without moving too far into a heavier silk feel.
Why Does DownyHaven Use 22 Momme Silk?
DownyHaven's Mulberry Silk Pillowcase uses 22 momme Mulberry silk.
The purpose is not to claim that 22 momme is the only good silk weight.
Instead, it is intended to balance:
- A smooth silk surface
- A substantial fabric feel
- Daily-use durability
- Soft drape
- Premium bedding weight
For shoppers comparing 19, 22, and 25 momme pillowcases, 22 momme sits near the middle rather than at either extreme.
Does Higher Momme Silk Feel Softer?
Not necessarily.
A higher momme generally makes the fabric denser and heavier, but softness depends on more than fabric weight.
It can also be affected by:
- Silk fiber quality
- Yarn quality
- Weave
- Finishing
- Dyeing
- Surface treatment
A lighter silk can feel exceptionally soft, while a heavier silk may feel more substantial rather than simply “softer.”
Does Higher Momme Silk Last Longer?
Higher momme fabric generally contains more silk by weight per area, which can make it more resistant to everyday wear than a very lightweight silk of otherwise similar construction.
But lifespan is not determined by momme alone.
Silk durability also depends on:
- Fabric quality
- Seam construction
- Frequency of washing
- Detergent
- Water temperature
- Drying method
- Sunlight exposure
- Snagging or abrasion
A poorly cared-for 25 momme pillowcase can deteriorate faster than a properly maintained 19 or 22 momme product.
Does Momme Affect Breathability?
Momme can influence how substantial a silk fabric feels, but it should not be treated as a direct “cooling score.”
A lighter silk generally contains less material per area, while a heavier silk is denser.
However, how a pillowcase feels during the night also depends on:
- Weave
- Finishing
- Room temperature
- Humidity
- The pillow and protector underneath
- Individual temperature sensitivity
This is why a higher momme pillowcase should not automatically be described as hotter, and a lower momme pillowcase should not automatically be described as cooler.
Momme vs. Silk Grade: Are They the Same?
No.
Momme describes fabric weight.
Terms used to describe silk grade or fiber quality refer to a different characteristic.
That means two pillowcases can both be 22 momme while differing in:
- Fiber source
- Yarn quality
- Weave quality
- Finishing
- Color consistency
- Construction quality
Do not assume a momme number alone proves every other quality claim on a product page.
What Is Mulberry Silk?
Mulberry silk is silk produced from silkworms traditionally raised on mulberry leaves.
It is widely used in premium bedding because it can be made into fine, smooth, relatively uniform silk yarns.
But “Mulberry silk” and “22 momme” describe two different things:
- Mulberry silk describes the type or source of silk fiber.
- 22 momme describes the weight of the woven silk fabric.
A useful product specification should make both the fiber content and fabric weight clear.
How Does Weave Affect Momme Silk?
Two fabrics with the same momme can still look and feel different because of their weave.
Common silk constructions include:
- Charmeuse
- Habotai
- Crepe
- Chiffon
- Organza
Some are glossy and smooth, while others are matte, crisp, textured, or sheer.
This is another reason you should not shop by momme alone.
For a broader comparison of pillowcase materials and weaves, read our Pillowcase Fabrics Guide.
How to Choose a Silk Pillowcase Beyond Momme
When comparing silk pillowcases, consider the complete product.
- Fiber content: Is it genuine silk?
- Silk type: Is the silk type clearly identified?
- Momme: How heavy and dense is the fabric?
- Weave: What creates the surface feel?
- Size: Does it match your pillow?
- Closure: Envelope, zipper, or open end?
- Construction: Are seams and edges well finished?
- Care instructions: Are they realistic for your routine?
Momme is only one buying factor. See our Silk Pillowcase Buying Guide for a complete buying framework covering fiber type, weave, closure, size, care and value.
If you are concerned about whether a product is genuine silk, see How to Identify Authentic Silk.
Does Momme Change How Silk Should Be Washed?
Momme alone should not determine your washing method.
The old advice that all lightweight silk must be hand washed while heavier silk can automatically be machine washed is too simplistic.
Care depends on the finished product, including:
- Silk type
- Weave
- Dyes
- Finishes
- Construction
- Manufacturer instructions
Always follow the sewn-in care label for the specific item.
For pillowcases, use the instructions in our Silk Pillowcase Care Guide.
Is More Expensive Silk Always Higher Momme?
No.
Higher momme usually requires more silk material per area and may increase cost, but price can also be affected by:
- Fiber quality
- Silk type
- Weave
- Dyeing
- Construction
- Size
- Brand
- Packaging and finishing
A more expensive silk product does not automatically have a higher momme, and a higher momme product is not automatically the best value.
19 vs. 22 vs. 25 Momme: Which Should You Buy?
| If You Prefer... | Consider |
|---|---|
| A lighter silk feel and lower entry price | 19 momme |
| A balance of smoothness, substance, and everyday durability | 22 momme |
| A heavier and denser silk feel | 25 momme |
For most shoppers, the decision does not need to be more complicated than that.
Choose the momme that fits the product's purpose and the fabric feel you prefer rather than assuming the largest number is automatically the winner.
Explore 22 Momme Mulberry Silk
If you prefer a silk pillowcase that sits between lightweight and very heavy silk fabrics, explore DownyHaven's 22 momme Mulberry silk options.
Shop 22 Momme Silk Pillowcases
Frequently Asked Questions
What does momme mean in silk?
Momme is a traditional measurement of silk fabric weight. One momme equals approximately 4.34 grams per square meter. A higher momme number generally means a heavier and denser silk fabric.
Is 22 momme silk good?
Yes. 22 momme is a popular weight for premium silk pillowcases because it offers a balance between a smooth silk feel, fabric density, and everyday durability.
Is 22 momme better than 19 momme?
Not universally. 22 momme is heavier and denser, while 19 momme feels lighter and is often less expensive. Both can be suitable for pillowcases depending on your preference and budget.
Is 25 momme better than 22 momme?
25 momme contains more silk fabric weight per area and feels heavier and more substantial. That does not automatically make it more comfortable or higher quality. Some people prefer the balance and lighter drape of 22 momme.
What momme is best for a silk pillowcase?
Approximately 19 to 25 momme is a practical range for many silk pillowcases. 19 momme is lighter, 22 momme offers a balanced feel, and 25 momme is heavier and denser.
Does higher momme mean thicker silk?
Higher momme means greater fabric weight per area and generally creates a denser, more substantial fabric. Exact thickness and feel can also vary according to yarn and weave.
Is momme the same as silk quality?
No. Momme measures fabric weight. Overall silk quality also depends on the fiber, yarn, weave, dyeing, finishing, and product construction.
Is momme the same as thread count?
No. Momme measures silk fabric weight, while thread count measures the number of threads in a defined fabric area. Momme is the more commonly used specification for silk fabric weight.
How much does 22 momme silk weigh?
One momme equals approximately 4.34 grams per square meter, so 22 momme silk weighs about 95.5 grams per square meter.
