Image | Bulma: Free, open source, and modern CSS framework based on Flexbox
image is-9by16. 9 by 16. image is-1by2. 1 by 2. image is-1by3. 1 by 3. The only requirement is for the parent element to already have a specific width . The image container will usually take up the whole width while maintaining the perfect ratio. If it doesn't, you can force it by appending the is-fullwidth modifier.