Note: - The products are measured by hand within the margin of 1-2cm error. - Out of environmental concept, the mat is packed with reel form. - The mat need to be placed for some time in warm place to recover its original shape because of PVC material characteristics. - The rolled mat will take some time to flat after unwrapped, but EVA mat has good flexibility. You can roll it the opposite way. An iron and a damp cloth is helpful also for flattening things that must not get too hot. - The mat is bluish because of light refraction which is normal and please don't worry.