I don't know fer sure, i've always had the thing coiled up around my shoulder. It takes me about 10 minutes to get hard, as the blood's gotta go a long way. I used to carry it coiled around my right shoulder, but the doctor's said i was developing acute scoliosis, so they developed a special backpack for me to carry it, kinda like how you wrap the cord of a vaccuum cleaner up.
I guess a better way to tell would be mass, i'm 170 lbs without it, 210 with it.
Oh yeah, when i fly, i have to purchase another ticket for it, and if an airplane doesn't have two adjacent (next together) seats for me, i have to wait standby for the next flight.