Dimensional Parts

New to all of this and have somewhat of a basic question when creating dimensional parts. Do parts have to be sized in multiples of the selected layer height when printing?

Again new to all of this and don’t really know the achievable accuracy of 3D printers but say you have a part that’s designed / spec'd out to be 5.6 mm tall but your using a layer height of 1.5?

Not being able to get an even number of 1.5 layers into a part that’s 5.6 mm, what size would the part end up being?

Thanks.