Starfinder Flip-Mat: Giant Starship: - Rules of Play says:

Whether the heroes are passengers (or captives!) on a vessel crewed by giant aliens or want more elbow room for their larger companions on their personal starship, no Game Master wants to spend time drawing every passageway and porthole. Fortunately, with Paizo's latest Starfinder Flip-Mat, you don't have to! This line of gaming maps provides ready-to-use science-fantasy set pieces for the busy Game Master. This double-sided, oversized map features two areas of a starship designed for Large creatures. Don't waste time sketching when you could be playing. With Starfinder Flip-Mat: Giant Starship, you'll be ready the next time your players want to upsize their ride! A special coating on each Flip-Mat allows you to use wet erase, dry erase, AND permanent markers with ease! Removing permanent ink is easy—simply trace over any permanent mark with a dry erase marker, wait 10 seconds, then wipe off both marks with a dry cloth or paper towel.