To resize your image is not a problem now, because we have made an easy-to-use Resize button. It can be found in the upper right corner of the artboard.
After you have made a design, please press Resize. You will see a list of categories available — Social Media post, Blogging, Covers & Headers, Marketing Materials, Events, and Advertising. Each category has a few design formats. If you need to set dimensions manually, select Set Dimensions at the bottom of the list.
Please note, you can select a few sizes at once. All of them will be opened in new tabs.