From the publisher's website:
Bigger than ever!
A dungeon filled with insidious traps, a magnificent imperial throne room, the citadel of an immortal tyrant—the possibilities for adventure are endless with Pathfinder Flip-Mat: Bigger Basic. With an area that's a whole 45% larger than Pathfinder Flip-Mat: Basic at their disposal, Game Masters can now dream even bigger! This massive gaming accessory presents two subtle textures—smooth stone and fine dirt—on which Game Masters can design any dungeon, battleground, or adventure set piece they desire. Don't feel like you always have to run your game in someone else's predesigned world. With Pathfinder Flip-Mat: Bigger Basic, the setting of your next adventure is yours to create!
Fully laid out, Flip-Mat: Bigger Basic measures 27 by 39 inches, but folds down to a convenient and portable 8 by 10 inches—easy enough to toss into your bag for the game! Its coated surface can handle any dry erase, wet erase, or even permanent marker. Usable by experienced GMs and novices alike, Pathfinder Flip-Mats fit perfectly into any Game Master's arsenal!