Many factors, including the recipe, room temperature, and humidity, will determine how long it takes for the dough to rise. The best way to decide whether it has risen sufficiently and is ready to be punched down and shaped is to perform a ripe test. Gently stick two fingers in the risen dough up to the second knuckle and take them out. If the indentations remain, the dough is ripe and ready for punch down. If not, cover and let rise longer.