Practical English Usage   (Michael Swan)

Adjectives: order before nouns

When several adjectives come before a noun (or when nouns are used to modify another noun), they usually have to put in a particular order. Unfortunately, the rules for adjective order are very complicated, and different grammars disagree about the details. Here are some of the most important rules:

1  color, origin, material and purpose

Adjectives (or modifying nouns) of color, origin, material and purpose usually go in that order.  

eg.        Color     origin         material        purpose     noun

               red     Spanish        leather            riding       boots

2   other adjectives

Other adjectives usually go before words of color, origin, material and purpose. It is impossible to give exact rules, but adjectives of size, length and height often come first.

the round glass table (NOT the glass round table)

a big, modern brick house (NOT a modern, big brick house)

long, flexible steel poles

( from mis.bitarafan)