22 Momme Grade 6A Silk Pillowcase: Sizing, Grade & Care

If you have been shopping for a silk pillowcase, you have probably met a wall of numbers: 19 momme, 22 momme, 25 momme, Grade 6A, Grade 5A, Queen, King, envelope, hidden zip. It can feel like reading a technical spec sheet when all you wanted was something soft to sleep on.

This beginner's guide unpacks the two specs that matter most - momme weight and silk grade - so you can tell a genuinely luxurious silk pillowcase from a thin, marketing-heavy one. You will also learn how sizing and closure choices quietly affect both quality and cost, and how to care for silk so it stays beautiful for years.

What "momme" actually means

Momme (pronounced "momm-ee" and abbreviated as "mm" or "momme") is the traditional Japanese unit used to measure silk's weight and density. It is the silk world's version of thread count, but far more reliable.

One momme equals about 4.34 grams of silk per square metre. In practice, the number tells you how much silk fibre is packed into the fabric. A higher momme means a denser, heavier, more durable and more lustrous weave.

Common weights for silk pillowcases include:

• 16-19 momme - lighter and more affordable, often a thinner charmeuse.
• 22 momme - the sweet spot for most sleepers: substantial, smooth and long-lasting.
• 25-30 momme - heavier and increasingly used for deluxe bedding and upholstery.

When a pillowcase advertises itself as a "silk pillowcase" with no momme at all, treat that as a warning sign. Real silk bedding almost always names its weight, because it is a point of pride.

What 22 momme feels like

A 22 momme silk pillowcase is where quality meets practicality. It is dense enough to drape with weight and a cool, liquid shine, yet still breathable enough to sleep on comfortably year-round.

Compared with a 19 momme option, a 22 momme case feels noticeably more substantial in the hand, resists fibre displacement better, and holds its sheen after repeated washing. It is the weight most often chosen by people who want one pillowcase to last rather than a disposable set.

Grade 6A: what the "6A" label tells you

While momme measures the fabric, the grade describes the raw silk fibre used to make it. Mulberry silk is graded from A (lower) up to 6A (the highest standard). A 6A rating means long, continuous fibres with very few impurities - which translates into smoother fabric, better durability and less pilling over time.

Grade and momme work together. A 22 momme pillowcase made from Grade 6A mulberry silk combines a dense weave with premium fibre, which is why it feels both heavy and impossibly smooth. A high momme number built on lower-grade fibre will still feel coarser than it should.

Look for "100% mulberry silk" and an explicit grade on the label. Terms like "silk-like" or "satin finish" usually mean a polyester blend, not silk at all.

Why 22 momme Grade 6A silk is kind to skin and hair

Silk's smooth, low-friction surface is the reason it has become a favourite of dermatologists, hairstylists and anyone chasing a better night's sleep.

Because silk strands glide against skin and hair instead of gripping them, it helps reduce friction that causes bed-head, flyaways, frizz and sleep creases. Silk is also naturally breathable and temperature-regulating, drawing moisture away from the skin so you stay comfortable overnight. It is hypoallergenic, which is welcome news for sensitive sleepers.

None of this requires a luxury budget mindset - it is simply what well-made mulberry silk does. You can see the difference in a genuine 22 momme Grade 6A case such as the Knitsilk 100% Mulberry Silk Pillowcase, which pairs both specs with a natural soft sheen in a warm beige.

Sizing: finding the right silk pillowcase for your bed

Size mistakes are one of the most common and avoidable pillowcase regrets. Buy for your pillow, not your mattress.

• Standard - roughly 20 x 26 inches; fits most standard pillows.
• Queen - roughly 20 x 30 inches; the most common choice, and the size of the Knitsilk Queen case at 75 x 50 cm.
• King - roughly 20 x 36 inches; for larger, generously filled pillows.

Measure your actual pillow with a soft tape before ordering. A pillowcase that is too small will fight the pillow and stretch the seams; one that is far too large will bunch and slide. If you sleep on a firm or overfilled pillow, size up rather than down.

Closure and construction: the details that affect cost and quality

Two pillowcases with the same momme and grade can still differ sharply in price because of how they are finished.

• Envelope closure - a folded flap tucks the pillow in, so there is no exposed hardware to catch on hair. It is gentler and usually a little cheaper.
• Hidden zip - keeps the pillow fully enclosed and neat, but a poor-quality zip can snag silk over time.

Also check the seams. French seams (which enclose the raw edges) and generous hems signal better construction. A single-sided silk case with a cheaper back panel can also cost less - worth knowing if a price looks unusually low.

How to care for a silk pillowcase

Silk is durable but deserves gentle handling. A few habits will keep your 22 momme case looking new.

1. Wash cold, by hand or on a delicate cycle. Use a pH-neutral or silk-safe detergent. Skip regular detergent, bleach and fabric softener.
2. Wash separately or with other silks to avoid zips and hooks snagging the weave.
3. Never wring or twist. Press the water out gently in a towel.
4. Air-dry in the shade, away from direct sun, which can fade colour.
5. Iron on low while slightly damp, or steam lightly. Never iron a dry silk case on high heat.
6. Rotate two cases so each gets a rest - a simple trick that roughly doubles their life.

Choosing a silk pillowcase: a quick checklist

Before you add to cart, confirm:

• The momme weight is stated - aim for 22 momme for the best balance of feel and durability.
• The grade is stated and is 6A mulberry silk, not a blended "satin".
• The size matches your pillow (measure first).
• The closure and seams suit how you sleep and how you wash.
• The brand is transparent about fibre, weight and care.

Silk is one of those quiet luxuries that pays you back every single night - smoother skin, calmer hair and a cooler, more comfortable sleep. Understand momme, grade, size and care, and you can choose a 22 momme Grade 6A silk pillowcase with confidence instead of guesswork.

Explore more premium mulberry silk and natural fibres at knitsilk.com, knitsilk.us and knitsilk.eu - softness with a story, made for makers and dreamers alike.