For a video intended for Instagram Stories or TikTok, which vertical aspect ratio is typically most effective for full-screen presentation?

The vertical aspect ratio typically most effective for full-screen presentation on Instagram Stories and TikTok is 9:16. An aspect ratio describes the proportional relationship between the width and height of a video frame. For example, 9:16 indicates that for every 9 units of width, there are 16 units of height, making the video taller than it is wide, which defines it as vertical. This specific ratio perfectly matches the dimensions of most modern smartphone screens when held in portrait orientation, which is how users primarily view content on these platforms. Full-screen presentation means the video occupies the entire visible display area of the device, without any black bars or empty space around the content, providing an immersive viewing experience. For example, a video with a resolution of 1080 pixels wide by 1920 pixels high adheres to the 9:16 aspect ratio.