I don't know whether it really exists.
I currently have a phone case that opens like a book with space for cards - that I'm always worrying will fall out. It's too bulky.
I want something:
Not leather
Small enough to fit phone in snuggly
Maybe a separate safe place for cards.
Not bulky (I got an ok one from Amazon, but it's really too big)
I'm a rucksack person (never handbag), yet I suppose I'm looking for the tiniest version of a bag possible. Would be great if it could go in a pocket (coat) or be carried on a strap.
Does such a (nice looking) thing exist?