2cm less than indicated

se a beautiful part ,, not too thin not too thick ,, really good with the nub of all ,, ,, is recently too small on all sides of this saver 2 cm so not 180x200 .. so no idea why ,, maybe they grade on offer rather than 29 therefore - only 22 euro ,, I do not know ,, I've specially exactly measured it ,, and again to see my bed to see if it is because ,, but no, he is smaller than indicated ;, I keep him anyway ,, because I send the to and fro everything is too much ,, and for 2 cm ,, well ,, I think is already ok ,,