INDUSTRY STANDARD CUTTING TOLERANCES.
Please fully unwrap you foam as soon as it is delivered allow it to settle for 24hours Prior to checking tolerances. Report size related issues within 48 hours. Do not allow foam to remain wrapped for prolonged periods as it can permanently shrink or compress below normal manufacturing tolerances .
Shrinkage can sometimes be reversed by simply stretching the foam slightly. Foam is elastic in nature its dimensions are not fixed as foam is a stretchy and playable medium.