Question about De'Longhi Magnifica

37 cm (the sieve is round at the front, which is the greatest depth, at the sides it is only 33 cm deep). However, the power cable is at the back. So if you push it in somewhere, you might have to add another 2 or 3 cm to avoid kinking the cable.

Is the machine rather loud or quiet while making the coffee?

40 cm measured over all