This International Standard specifies measuring equipment and procedures for the determination of the linear dimensions of rigid plastics test specimens. It is applicable to test specimens described in ISO 20753 but can also be used for other test specimens, and to thicknesses typically in the range 0,4 mm ≤ h ≤ 6,4 mm.NOTE Determination of dimensions of test specimen made of semi-rigid materials (70 MPa ≤ E ≤ 700 MPa) can follow ISO 23529:2010[1].