I see you are using the Avada builder, you can reset your customization settings and reinsert them, or you can enter the image settings from the native WordPress builder. that is to say go to pages, then all pages, find your page and finally click on edit. another alternative would be to edit the images with external image editing software like photoshop or canva so that they are the same size before even importing them into wordpress, then duplicate one of the sections and put the images.