1. When there are two or more adjectives that are from the same group, the word and is placed between the two adjectives:
Ex : The house is green and red. / The library has old and new books.
2. When there are three or more adjectives from the same adjective group, place a comma between each of the coordinate adjectives:
Ex : My friend lost a red, black and white watch.
3. In order of adjective Quantity or number comes before Quality or opinion
Ex : My sister adopted a beautiful big white bulldog.