Ideally, your response in the PTE Describe Image task should contain between 3 to 5 well-structured sentences. This range helps ensure that you cover the necessary aspects of the image—introduction, major details, and a summary—without rushing or running out of time. The 40-second limit makes it important to stay concise yet informative.

A solid describe image PTE template typically includes an introductory sentence (e.g., "The image shows..."), two or three detail sentences (e.g., "The highest value is...", "It can be seen that..."), and a concluding sentence. Practicing with a pte describe image structure like this ensures you don’t under- or over-speak, both of which can affect your fluency and content scores.