What size is the O-ring on my power steering pressure hose??

RustyRatRod said
Should be 3/8". Take an open end wrench and measure where the o ring goes.

It’s the other end, more like 5/16 probably even a 1/4” as the tube where is slide over is .265”. Was just hoping some had been through this before and had the magic sauce recommend. I will try a few