How do I change the static size of a story block?

Wondering if there’s a way to adjust the story block size (before a user taps/clicks on it to expand to full screen). Right now on mobile especially it appears rather small and I can’t seem to find a way to change the size.

The wordpress story block support page also has nothing on changing the static size.

[https://wordpress.com/support/wordpress-editor/blocks/story-block/])

Thanks!

 

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