I use the 4.0, 4.5 and 5.0Qt - American unit Quart - (or 3.0, 4.28 and 4.83 liters) bowl and the lid fits both 4.5 and 5.0Qt bowl. Deepening actually serves that the lid can also be used when the bowl is locked in the machine. I have to disagree here with my Artisan everything fits perfectly together. I bought two sets to cover two and a cover tailored to me that I can use it as a splash guard. Therefore, there are 5 out of 5 points.