Printing on Custom Size Paper

Hello,

I'm attempting to print onto 155mmx155mm paper.
I have a Canon Mx456- just an old el cheapo thing.
In print preferences I enter the custom size however when it prints it has a border which I don't want. I cannot make a custom size border less.

I have tried a variety of different ways to force it to print how I want. However each time either:
It prints with a border
It prints without a border but off centre
It prints without a border but only half of the design is printed

Is there a...

Printing on Custom Size Paper