
The dalmatian with perfect spotting has yet to be born! Ideally the spots should be as round and distinct as possible, on the body about 20 - 30mm, but somewhat smaller on the head, legs and tail. The ears should have plenty of white on them, and the spots should be evenly distributed over the body.
That is the ideal that breeders aim for, but spotting is only part of the dog, and correct construction is more important than correct decoration - you can't follow a carriage for miles on the strength of your spots!
Decoration faults are, however, one of the things that decides whether a dalmatian is 'show potential' or purely a pet.
Hope this helps.
:)