I have my fabrics on white coated metal shelves. I can see that I have lots and lots of yards of fabrics. Every time I hope the closet I see three shelves, about 12' wide with several stacks of fabrics. I only buy remnants of fabrics to go with what I have.
I never measured them, don't know for sure but, guess I have many, many yards. I think I will have to live to be about 200-300 years old to use it all.