FABRIC MEASURING

What a disappointment to find that some of  my fabrics are not the proper measurements. My recent online purchases which are yards, a couple of them are measuring at 35&1/2" rather than 36" which is what I thought a yard actually measured. A few half metre lengths are also measuring slightly less. I know, its probably hardly worth while bothering about, but think about it over a group of 10 different fabrics you could be loosing 5" of usable fabric. In future I will measure them immediately I receive them or get them home after shopping. Am I too picky??????????