The complete guide
How To Choose A Silk Head Scarf, A Plain English Buyer's Guide
The problem with most scarves
Most scarves are bought for one job and then only ever do that job. A patterned square ends up matched to one outfit. A thin polyester wrap slides off halfway through the night. A cotton bandana looks right but leaves your hair looking like it lost an argument.
What people actually want is one scarf they can grab without thinking. Something plain enough to go with everything, big enough to wrap properly, and smooth enough that it does not rough up hair while it sits there. That is a fairly short list, and it is why a plain black mulberry silk square keeps coming up.
This guide walks through what matters when you are choosing one: the weight of the silk, the size of the square, the weave, how to wear it, and how to look after it so it lasts.
What momme actually tells you
Silk gets sold with a number attached to it, written as momme and often shortened to mm. It is a weight measurement, borrowed from the Japanese silk trade, and it describes how heavy a fixed area of the fabric is. More momme means more silk per square inch.
Here is why you should care. Low-momme silk, somewhere in the 12 to 16 range, is light and airy. It is lovely for a floaty scarf that sits decoratively at the neck. It is frustrating for a head wrap, because it slips, the knots work loose, and the fabric wants to float away from your head rather than sit against it.
Go much higher, into the mid twenties, and the silk starts to feel more like a fabric for bedding or heavy blouses. It is beautiful, but it is bulkier to knot and slower to dry.
Nineteen momme sits in the useful middle. There is enough weight for the scarf to hold its shape, stay knotted and fall properly at the ends. There is not so much that it feels like you are wearing a tea towel. If you are shopping for the best 19 momme silk scarf specifically, this is the reason the number keeps showing up in search results.
Why the size matters more than people expect
A 36 inch square is a serious scarf. Folded corner to corner it gives you a triangle with a long edge around 51 inches, which is enough to go round an adult head with plenty left over to tie.
Compare that to the small squares a lot of shops sell, often 21 to 27 inches. Those are fine for a neckerchief or tying to a bag, but try to wrap thick or long hair with one and you will run out of fabric before you run out of hair. You end up with a knot that will not hold, or a wrap that creeps back off your forehead every time you turn over.
If you have long hair, a lot of volume, braids, locs, or a full set of curls, size is the first thing to check. A large silk scarf for hair in the 35 to 40 inch range gives you room to actually work with.
The square shape is doing something too. Squares fold into triangles, bands, rolls and bandanas, which is four different looks from one piece of cloth. A long rectangular scarf can only really do two.
Charmeuse, and what the two sides are for
Charmeuse is a satin weave. In plain terms, the weaving pattern floats most of the silk threads on one face of the fabric, which is what gives that side its gloss and slipperiness. The reverse has a softer, flatter finish.
Both sides are silk. Neither is the wrong side. In practice a lot of people wear the glossy face out for a dressier look and the matte face out for something quieter, or they turn the glossy face inward against their hair at night.
The smoothness is the functional part. Hair slides over a charmeuse face with much less drag than it does over a rougher woven cotton. That is just a property of the surface, nothing more mysterious than that, and it is why a silk hair wrap for sleeping is such a common recommendation for anyone growing hair out or protecting a style between washes.
Who this suits
If you wear your hair wrapped at night, this is the obvious use. Fold into a triangle, place the long edge along your hairline, cross the ends at the nape and tie. Tuck the point in at the back. A 36 inch square gives you enough tail to do that comfortably even with a lot of hair.
If you want a daytime accessory, the same square becomes a neck scarf in a loose knot, a headband rolled into a two inch band, or a bandana folded flat under a cap. Black does not fight with anything, which is what makes it the most practical plain black silk bandana choice if you only want to own one.
If you travel, it earns its space. It compresses to nothing, warms your neck on a cold flight, covers your hair after a swim or a long drive, and dresses up a plain shirt when you get somewhere nicer than expected.
If you are buying a gift, there is no size to guess and no color decision to get wrong. That alone makes a silk headscarf gift easier than most clothing.
How to choose between options
A few things to weigh up when you are comparing scarves.
Check the silk content first. "Silk feel" and "satin" mean a synthetic that mimics the surface but not the fiber. This one is 100% mulberry silk, graded 6A, which refers to the quality of the raw filament. Then check the momme. If a listing does not tell you the momme, that usually means it is low. Then check the actual dimensions in inches or centimeters, not a vague word like "large".
After that it comes down to finish and color. A plain color is the versatile choice. A print is a statement, and statements date faster.
Looking after it
Silk has a reputation for being delicate that it only half deserves. The fiber itself is strong. What it dislikes is heat, harsh chemicals and rough handling.
Wash on a gentle cycle in cool water, inside a mesh bag, with a detergent formulated for silk or wool. If you would rather hand wash, swish it in cool water for a minute or two, rinse, then press the water out between a clean towel. Do not wring it.
Dry it flat or hung, always out of direct sunlight and away from radiators. Sun is the main thing that will take the depth out of a black dye over time.
Iron on the lowest setting, on the reverse, while the silk is still a little damp. Skip the bleach entirely. Spray perfume and hairspray before you put the scarf on, not after, because alcohol can leave marks.
Store it folded loosely or rolled in a drawer. Keep it away from velcro, rough rings and anything that can snag a thread.
Do all that and a good silk square will still look right in five years.
The short version
A 36 inch square of 19 momme Grade 6A mulberry silk in charmeuse weave, in black. The weight is enough to hold a knot and drape nicely. The size is enough to wrap long, thick or textured hair with room to tie. The weave is smooth, so hair slides over it rather than catching. The color goes with everything, which means it stays in use rather than getting shelved.
Machine wash it gently, keep it out of the dryer and out of the sun, and it will carry on being the scarf you reach for first.