You are looking at cotton bedding and the label says 140s. It is not a size, and it is not the thread count you are used to comparing. So what is it, and should it change what you buy?
It is a useful number once you know how to read it. It describes the thread itself, which is where the feel of a cotton sheet begins.
The short answer: the "s" number is the yarn count. It tells you how fine the cotton thread is, and a higher number means a finer thread. 140s is a very fine yarn that can only be spun from long-staple cotton. Thread count is a different measure: it counts how many threads are woven into a square inch of fabric.
What the "s" means
Yarn count is a spinner's measure. In the traditional cotton system, it is the number of standard lengths of yarn, called hanks, that it takes to make up one pound. One hank is 840 yards. If it takes 140 of them to weigh a pound, the yarn is a 140s.
The more yarn you get from the same weight of cotton, the thinner that yarn must be. A higher count means a finer thread. A 140s yarn is much thinner than a 40s.
Yarn count is not thread count
The two are easy to mix up, because both are numbers on a bedding label and both tend to rise with quality. They measure different things.
| Yarn count (140s) | Thread count | |
|---|---|---|
| What it measures | How fine each thread is | How many threads are in a square inch of fabric |
| Describes | The yarn, before weaving | The cloth, after weaving |
| A higher number means | A thinner, finer thread | A denser weave |
| What it tells you about feel | Smoothness and lightness | Density and weight |
The two are connected. Finer threads take up less room, so more of them fit into the same square inch. That is why fabric woven from fine yarn can reach a high thread count honestly, while still feeling light.
Thread count on its own can be made to look better than it is, for example by counting each strand in a twisted, multi-ply yarn as a separate thread. Yarn count is a good second number to look for.
Why fine yarn needs long-staple cotton
Staple is the length of the individual cotton fibers. Yarn is made by twisting those fibers together, and the thinner you want the yarn, the fewer fibers there are in any one spot to hold it together.
Short fibers cannot do that job at a very fine count. The yarn would be weak and fuzzy, with many loose ends. Long fibers overlap each other over a greater length, so they can be spun into a thread that is very fine and still strong, with a smooth surface. This is why a count as high as 140s is only made from long-staple cotton. The count and the quality of the fiber go together.
How 140s cotton feels
Everyday cotton bedding is commonly woven from much coarser yarn, often somewhere around the 40s to 60s. It is sturdy, familiar and perfectly good to sleep on. Bedding woven from very fine yarn feels different in the hand:
- Smoother. Fine, long-fiber yarn has fewer loose ends, so the surface feels sleek instead of fuzzy.
- Lighter and more fluid. The cloth drapes instead of sitting stiffly on the bed.
- A soft sheen. Especially in a satin or jacquard weave, fine cotton catches the light in a quiet way.
- Still cotton. It is breathable, it feels cool and dry when you get in, and it is familiar to care for.
The weave matters too. The same yarn woven as a crisp percale, a smooth sateen or a patterned jacquard will give three different fabrics. Our 140s Cotton Jacquard Bedding Set is 100% long-staple cotton in a jacquard weave, which means the pattern is woven into the cloth, not printed on top.
Is a higher count always better?
Not always. Finer yarn makes a more refined fabric, but it also makes a more delicate one. A coarser, heavier cotton will put up with hot washes and rough handling that a very fine cotton deserves to be spared. If you want bedding you never have to think about, for a child's room or a rental, ordinary cotton is a sensible choice.
If you want the smoothest cotton you can sleep on and are happy to wash it gently, a high yarn count is where to look.
Questions people ask
What is the thread count of 140s cotton?
There is no single answer, because yarn count does not fix thread count. The same 140s yarn can be woven more or less densely. Treat them as two separate facts about a fabric.
Is 140s cotton the same as Egyptian cotton?
No. Egyptian cotton names where the cotton was grown. 140s names how finely it was spun. A fine count needs long-staple cotton, and long-staple cotton is grown in several parts of the world.
Is 140s cotton like silk?
It is the closest cotton comes in smoothness, but it is still cotton: a little more matte, a little crisper, and easier to care for. Silk has its own measure, which we explain in what is momme in silk.
If you are deciding between fibers, it helps to read what silk cotton bedding is and who it is for, and how silk and linen bedding compare. You can also see all of our bedding sets side by side, in cotton, silk and blends of the two.
