Lookie lookie what the postman brought to me:
They are made of Vinyl and 120×85 and 90×90 respectively. I am very pleased how the prints came out and most of all the price was very reasonable. If I had kept them rolled up you would not see any creases but even those you can see will be no obstacle for gaming.
The 510g Vinyl will be much more durable than any paper gaming mat and I am looking forward to a Warzone match against Steven and a Space Battle between my Cylons and Colonials.