The roulette numbers are aligned in three vertical columns. The first column starts with 1 and continues to 4, 7, 10, 13, 16, 19, 22, 25, 28, 31 and 34.
In American roulette, there is a second green pocket marked 00. Pocket number order on the roulette wheel adheres to the following clockwise sequence in most casinos: Single-zero wheel. 0-32-15-19-4-21-2-25-17-34-6-27-13-36-11-30-8-23-10-5-24-16-33-1-20-14-31-9-22-18-29-7-28-12-35-3-26.