Where I can find image examples of the theme or download them?

Hello I would know the dimensions or sizes of the images that appears in the demo or the default theme. For me can be also very interesting have a dessin of theme with the name of widgets or areas. For example I would like to know the dimensions of the background image of this link: https://woodmart.xtemos.com/shop/ and also know the name of this position on the theme (Now, in my web this area appears with the black color background, without any image). I think some themes include the images of the demo, examples of product images, banner images or slide images, in order to have an orientation. Where I can find this? Thanks!