The size of the vertical version of Douyin videos is 1080 pixels x 1920 pixels, which is often referred to as the 9:16 ratio. This size is designed to meet the needs of vertical screen shooting on mobile phones, and is also one of the most commonly used video sizes for Douyin. When making a vertical version of a Douyin video, you need to pay attention to details such as the composition of the video content, the size and position of the text font, and the color to ensure the best presentation of the video on Douyin. At the same time, when making a Douyin video, you also need to pay attention to the length of the video, the choice of music, and the reasonable use of special effects, filters and other functions provided by Douyin to enhance the attractiveness of the video and increase user interaction and conversion rates.