Grading Silk Blouses for Fall 2026: Momme, Cut, and Seams
November 6, 2026
Grade a silk blouse on the silk itself, the cut, and the finishing. Real mulberry silk with a momme weight over 16, a cut that drapes without clinging, and French seams or bound seams will last years. A polyester blouse sold as silk, or a silk blouse with raw overlocked seams, is a one season purchase, whatever the price tag says.
The silk itself, and the label that lies by omission
The label tells you what is in the blouse, and it tells you what is not in it by leaving it out. A blouse labelled 100 percent mulberry silk is the real thing, and mulberry is the grade to look for, because it is the longest, finest silk fibre. A blouse labelled silk blend with no percentage is usually mostly polyester, and the silk is there for the story, not the fabric.
The number that matters, and the one almost never printed on a high street label, is the momme weight. Momme measures silk fabric density, and a blouse in 16 to 19 momme silk drapes well, stays opaque, and resists snagging. Below 12 momme the silk is sheer and fragile, and it will need a camisole and careful handling. You cannot read momme on most labels, so read it with your hand. A blouse that feels substantial and drapes in folds is higher momme. A blouse that feels like tissue paper is not.
The cut is the difference between a blouse and a tent
A silk blouse lives or dies on the cut, because silk shows every mistake. A good cut skims the body without clinging, with enough room at the bust and the waist that the fabric falls in clean lines. A bad cut pulls across the bust, gaps at the buttons, and billows at the waist, and no amount of good silk will fix it.
The button test is the check. Button the blouse fully and sit down. If the front pulls or gaps between the buttons, the cut is wrong for you, or the blouse is too small, and a larger size will only make the shoulders too wide. A good silk blouse has a hidden placket or well spaced buttons, and it lies flat when buttoned. If it does neither, leave it on the rack.
Seams, and the parts nobody photographs
A silk blouse should have French seams or bound seams, where the raw edge is enclosed and cannot fray. An overlocked seam, where the edge is just whipped with thread, will fray and pull on silk, because the fibres are fine and the weave is loose. Turn the blouse inside out and look. A clean, enclosed seam is the mark of a blouse that will last. A raw, overlocked edge is the mark of a blouse that will not.
Check the buttons too. A good silk blouse has spare buttons sewn inside the hem, and the buttons themselves are shell or corozo, not plastic. A blouse with no spare button and plastic buttons is a blouse the maker did not expect to last, and the price tag is a story, not a measure.
The grade, in one line
A blouse in 100 percent mulberry silk, 16 to 19 momme, with a cut that skims without pulling, French or bound seams, and shell buttons, is a blouse that will last years. A blouse that fails two of those four is a one season purchase, and its price tag is a story, not a measure. Buy the grade, not the label.
Keep reading: Quick answers, About Trend Grade HQ, and Grading Cashmere Sweaters: Micron and Staple Length Beat the Label cover the nearby cases in this series.
Frequently asked questions
How can I tell real silk from polyester?
Real silk feels warm to the touch and has a slightly irregular texture, while polyester feels cool and perfectly smooth. The burn test works on a loose thread: silk smells like burnt hair and leaves a crushable ash, while polyester melts into a hard bead. Check the label first, since a reputable maker will state the fibre content clearly.
What is momme weight?
Momme is the unit for silk fabric weight, written as mm. A blouse in 16 to 19 momme silk is the usual quality range: substantial enough to drape well and opaque enough to wear without a camisole. Below 12 momme the silk is sheer and fragile, and above 22 momme it is heavy enough for a dress or a jacket.
Why do silk blouses snag so easily?
Silk fibres are fine and the weave is often loose, so a rough nail, a bracelet, or a bag strap will pull a thread. A tighter weave and a higher momme weight resist snagging better. Keep the blouse away from velcro and rough jewellery, and the snags stay rare.
Can I machine wash a silk blouse?
Only if the label says so. Most silk blouses want hand washing in cool water with a gentle detergent, or dry cleaning. A machine wash, even on delicate, can shrink the silk and dull the finish. When in doubt, hand wash it.