Brake line size

Maintenance/Repairs
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1

My 1996 GMC 4wd pickup blew a brakeline under drivers door-the one going to the rear brakes-it has the Kelsey-Hayes ABS brake system. In the maze of brakelines there are several sizes-The one going to the rear looks like its bigger than 3/16". Does anyone know its size? 1/4"? Thanks