"a big jacket"
Would be nice to hear the sounds when selecting one of the answers to practise the hearing of the characters!
Rule: Adjectives in Arabic always come after the noun they are describing. Like in French, Italian, Spanish... etc.
If the adjective is attributive (describing the noun directly) then it follows the noun in all its aspects: Gender, definite article, number.
If the adjective is predicative (telling the status of the noun), the adjective would follow the noun only in number and gender.
Not to mention having to read from right to left instead of left to right.