Vocabulary size and the ability to use words are related to every aspect of the TOEFL exam. Many TOEFL test takers still have vivid memories of the famous "Red Treasure Book", which was the vocabulary bible for those taking the old TOEFL. Candidates for the old TOEFL exam needed to master a list of 8000 words. Although the format of the exam has changed somewhat in the new TOEFL, the requirement for vocabulary size has not decreased.