How long is church or church service?

I am a Catholic myself so I will answer this question based on experience. First of all we call our service a "mass". The mass usually lasts somewhere between 35 minutes to one hour. At Easter time, Christmas and some other feast days the mass may last longer. It all depends on the lenght of the sermon, if there is singing or not during the mass and how fast the priest talks. I hope that answered your question.