The upper hoses on my 33 are 10 1/2 inches long. This seems about right, there is a little more room on the radiator side, so I suppose they could even be a little longer.
I don't know what the original ones were.
B-8260-A --hose radiator inlet ID 2"X 11-1/4 long ---4cyl, 28-34
BB-8260-B---hose radiator inlet-12" long by 1.75"--use with thermostat--32-37 8cylinder
From Ford parts book printed in 1945---so may be 1 size fits all-- cut to fit