Chambers; Chamber

Source: Dungeon Master’s Guide p. 291

Chamber

dice: d20	Chamber
1-2	Square, 20 × 20 ft.¹
3-4	Square, 30 × 30 ft.¹
5-6	Square, 40 × 40 ft.¹
7-9	Rectangle, 20 × 30 ft.¹
10-12	Rectangle, 30 × 40 ft.¹
13-14	Rectangle, 40 × 50 ft.²
15	Rectangle, 50 × 80 ft.²
16	Circle, 30 ft. diameter¹
17	Circle, 50 ft. diameter²
18	Octagon, 40 × 40 ft.²
19	Octagon, 60 × 60 ft.²
20	Trapezoid, roughly 40 × 60 ft.²
^chamber

¹ Use the Normal Chamber column on the Chamber Exits table.

² Use the Large Chamber column on the Chamber Exits table.