As a general guideline, remove cake from refrigeration:
The time it takes for a cake to reach room temperature varies depending on a number of factors including:
1 ... Serves 1
6" ... Serves 10
8" ... Serves 18
10" ... Serves 35
12" ... Serves 50
14" ... Serves 75
6" ... Serves 18
8" ... Serves 32
10" ... Serves 50
12" ... Serves 72
14" ... Serves 98
1/4 Sheet ... Serves 24
1/2 Sheet ... Serves 54
Whole Sheet ... Serves 96