Was there any particular image you were looking for the specs on? For example, a product page image, or a hero banner? Just so I can be more specific with my answer! There is more info here on the recommended image sizes for product page images, and more info here on the Image Banner and Image with Text section for the Dawn theme. Are you currently switching to Dawn from an older theme, or have you just started out with Shopify? I'd love to know more!
Thanks so much for the response, @IQshonnie!
For product images, it's best to follow our guide here on product media which says:
Your product and collection images can be any size up to 4472 x 4472 px, or 20 megapixels. Product and collection images need to have a file size smaller than 20 MB to be added to Shopify.
High-resolution photos look more polished and professional to your customers. For square product images, a size of 2048 x 2048 px usually looks best.
Your images can be any size up to 4472 x 4472px. There is more information here on how to take amazing product photography, it's well worth checking out! Are you having any trouble at the moment with your product images? Do you know the dimensions of the current images you'd like to use on your product page?