Note: Make sure to install Jupiter X Core plugin at first after theme activation in Appearance > Jupiter X > Plugins.
Jupiter X offers a way to create custom image sizes and use it anywhere you want. After creating the custom image size, you can use it in the Elementor or any other page builder you are using. In order to create an image size:
1. Navigate to Jupiter X > Control Panel > Image Sizes.
2. Click on Add new Size.
3. Enter the dimensions and hit Save.
Note: By default, Jupiter X has one Custom Image Size which has 500×500 pixels dimension.
To learn more about Image Sizes, refer to this article.