The classic yellow duster. These are 60x48cm which is a proper size (but expect some shrinkage in the wash). Some end up very dinky and frankly a bit useless. Not these big boys. I really like them and I'm gradually expelling all the others that aren't up to Duster (see what I did there?)
The only unsusual thing about them is that the overlocking stitch on the edges is green, not red. I do hope this won't upset you too much.
They are a household staple and a most excellent all round cleaning cloth. Use them wrung out and wet as well as for dry dusting. Just remember WASH THEM SEPARATELY until they are very, very old. The yellow will run and you won't be happy.
So why are they yellow? Here's what the BBC has to say

