It’s just a plain percale weave, isn’t it? It’s not brushed/flannel/jersey, but is there any other sort of naming I should be looking for?
This sheet is probably 50+ years old and is labelled as “Duro” a UK brand that doesn’t seem to exist anymore

Muslin. Muslin sheets used to be less expensive than cotton percale and now vintage & new genuine muslin sheets are expensive.

Not percale. Muslin. Can be called linen, but not the generic broad term, such as “ linen closet”..

OP’s grandmother bought a nice sheet…

Today, normal sheets are "measured" by thread count, so the thread count of these will likely NOT help you finding a twin. This applies to percale/sateen sheets. Other sheet types such as jersey, flannel, etc., are "measured" by material weight in GSM or Ounces, so if you know for sure its 240GSM via a label, you are best advised to find that via google.

I'm not Johnny Sheets, so the above may be a bit off.

Seems to be muslin. However the closest thing we have found to “grandmother’s sheets” that are still in production are Red Land Cotton. It has a thread count of 140!

I want two sheet on my bed

Decadence

Old school home economist here, that appears to not be made of cotton but made of linen. Linen is made from the plant that grows flax. Yes it will feel heavier. To be certain it would need to be tested. Are there no tags on the sheet? I suggest you find a linen sheet and compare it. Best wishes to you.

Red Land Cotton has been a big disappointment for me. It is possible they are BIFL. I bought sheets and towels for my wife for Christmas. So it has only been a little over a month, and they’ve only been through the wash a few times.

The sheets are just “ok”. Not particularly heavy, not particularly thick, and definitely not soft. They are just ok. An ok product for a premium price. Would not buy again.

The towels feel like junk. I got the “bath sheets”. The size is big, as advertised. But they are very very thin. Not anything close to fluffy luxury. Thin enough you can see through them when you hold it up to the light. My Target towels with 8 plus years of washing are way better. Soft fluffy and absolutely nothing to be seem through them. 8 years of use and they’re better than brand new Red Land Cotton. Would not buy again

Looks like plain weave linen, not cotton.

Do you mean linen as in flax?

Yes

Hi, hijacking the top post to thank everyone for the responses so far. Opinions seem to be it is either muslin ( a type of cotton) or linen (flax).

I'm going to get samples of both to test, although in my search I came across a 300gsm Italian linen sheet which looks incredible.

Someone asked about a label, all it says is "Duro superb quality guaranteed R.T.S.A tested"

A 1:100 metric ruler really seems to have limited interest.

Engineer's ruler, it has six different scales, quite handy for drawing scale diagrams.

It's linen. You can tell by the slubs in the weave.

looks like linenl because of the stubiness

Yeah, I get that, but like it's litteraly the same graduations except it's marked 'm' instead of 'cm'.

Seems more useful with less trivial scales, like 1:25 and others.

You know you’re not helping anyone on this post yeah? Fickle ass. Literally no one will ever care about this again except for you.

Just an FYI; true vintage muslin sheets have a thread count of 130-145 threads per square inch. That is why people the people who love them look for them - they're so breathable. The loose thread count and the lack of any synthetic fiber like polyester don't trap sweat and body odors.

Don't be fooled by new "muslin" sheets. If they say something like "wrinkle free" that means they're not 100% cotton muslin, but a blend with a synthetic fiber.

It’s linen. I had to pay 250€ for one sheet

Have a nive day as well!

Should be quite easy to tell between linen and cotton. Linen will feel very floppy, and drape almost as if it’s weighted. Linen also creases very easily and retains creases. The texture looks like linen.

It's a linen percale. Most likely Irish loomed if it's heavy weight, slight slubs, and ticks that tight while still low thread count.

Linen. Lucky you.

Agree. Red land sheets are fantastic. The whole thread count thing is mostly just a marketing gimmick

You guys really know your fabrics.

I've tracked down some lyocell-linen blend bedding online, will treat myself.

Edit: for those in the EU go to [Muji] (https://www.muji.eu/home/home-bedlinen)

I want two piece toast

This looks pretty similar to my linen sheets, but mine are organic and un-dyed so their color is more of a tan/taupe color. But the weave and look of it seem very similar.

That looks like linen. All sheets set we have right now are linen although I don't think they're that heavy. But I do have one summer dress that's made of heavy linen and this sheet looks similar to it.

I spent a lot of money for each sets but so far they're worth it. Only the extra blankets/bed covers are cotton.

We wash them with baking soda for pre wash and white vinegar for rinsing. They immediately became soft. They're warm in winter and cooling in summer.

They do have the natural lived in look but it's better as we honestly don't have time to iron our beddings.

To jump off this, anyone know a vendor with a good Muslin sheet or something else breathable, soft, durable, but also zippered for a queen bed?

OK, I just tracked down a pair of Irish linen flat sheets for the bargain price of £1,188.79 !

The sheets take about 6-7 washes to really soften up and after that, they are amazing. My wife insists on only using them, which is hilarious since she thought I was exaggerating about them. Nothing is for everyone though.

To us the towels are the perfect weight, feel, and absorbency. They aren’t as “fluffy” as others maybe, but they all lose that feeling anyway since it’s mostly chemical induced. We only use their towels too, but the sheets are worth it more than the towels. Sorry you were disappointed with RLC, their products truly are incredible. I would wash the sheets a few more times for sure, but if you don’t like the towels you probably won’t ever

Got a link? 😁