A series of adjectives does not always require commas.
In the sentence below a comma takes the place of and. The words tall and distinguished could be reversed.
In the following example, commas are not needed because little would not be reversed with old.
See the short slide show here:
If you need a good review of commas in general, watch this:
(Ignore the misspelling of comma near the end!)
1. Write a page describing a July 4th scene.
2. Use adjectives and commas as needed.