Hi all, I started to add a customised blog feed to one of my normal sites but would like to increase the overall size of the boxes but just see by now the option to switch between the different blog layouts.
I am sure it must be possible :) therefore would be great to get your advice!

Hello @Anja Mehler,
When using blog feeds and custom feeds, you can only control the overall size of the feed. If you want to be able to control individual sizes of post previews, I suggest giving a shot and trying to work with Corvid.
It lets you create your own custom layouts for your blog, you can check out my explanation on how to use Corvid+Blog in a similar discussion here:https://www.wix-blog-community.com/blog/discussions/can-you-use-dynamic-pages-and-datasets-to-create-your-own-custom-blog-pages-on-wix-without-coding
Hope this helps!