These are labels on the fabric on sale in Belarus.
(This is a fantastic place to buy fabric and haberdashery equipment. That linen to the left for example, is top quality!)

I think it's hard to read the hand writing and understand what the abbreviation stands for.

But I would guess that it is about the width of the fabric, the quality and the price per metre.

ткань = fabric
скатерть = tablecloth

льняной
linen cloth — льняная ткань