Xtremely wavy ! here's a pic of my cutting mat as i try to convince it to be flat like the table. 24 hours and it still wants to curl. the 5x10 i got is fine, but this 4x8 is bein a *#@%*. "Xtreme" suggests i put it in the sunlight to help it , but i would have to put it outside . Im loosing patience. A big iron maybe?!? Some starch too?