From publisher blurb:
Each set in the Dungeons in Blue Big Time series contains twelve brand-new geomorphs featuring extra-wide hallways and cavern passages, along with the usual assortment of rooms, chambers and caves. Check out the convenient preview to see exactly what your getting in Big Time Two.
The Dungeons in Blue series brings classic blue maps to the virtual tabletop! These ready-to-fill maps are packed with rooms, corridors, pits, and caves; all judiciously sprinkled with tricks and traps. Every geomorph tile seamlessly connects to every other tile in the series, providing the megadungeon builder tremendous freedom and flexibility.
This product includes twelve unique map tiles rendered at 100px per five-foot square. The set includes two versions of each tile, one for players and one for GMs. The GM's version shows additional features, tricks, and traps. This set includes (BT1-BT12):
Six 100x100 foot tiles.
Six 50x100 foot tiles.
A map legend image detailing all map markup.
A one-third scale summary map showing all tiles.
A short readme PDF.
All maps are ready-to-use PNG-format files compatible with most virtual tabletops. Use them as-is, or combine them into larger maps using your favorite image processing software.