Hi

I have a space of 135cm which runs along the back of my house (from exterior wall to patio balustrade)

I am looking to on the one side have a counter which runs along the wall and 3 backless bar stools at the counter

Given the space I have how wide could the counter be (I want to eat at the counter) and still have space to sit at the counter and have people walk behind the stools.

Thoughts appreciated

Thank you