The ratio of Instagram Reels is 9:16, which means the videos and photos should be 1080 pixels wide and 1920 pixels tall. This aspect ratio allows the content to utilize the entire screen on a users mobile phone, providing an optimal viewing experience. Additionally, Instagram Reels can be up to 60 seconds long, with a minimum frame rate of 30 FPS (frames per second) and a minimum resolution of 720 pixels. Its important to adhere to these dimensions and specifications to ensure that the content is displayed correctly and engages the audience effectively.