Not that important

Just a point of curiosity... my 69 dart GT has 10" front brakes. The hoses are for 9" brake set up though. I have the short hard lines on the back of my brake plates and the female/female brake hoses like a 9" set up. I just noticed when ordering hoses I have to order 9" hoses even though I have 10" brakes. Curious if anyone has seen that....