I'm not in the garage right now, I'm at work...and although I've never actually taken a ruler to it, I've washed it enough times to know it's more than 6 inches...I'd say it's more like 9 or 10 inches.
Maybe a foot.
But definitely not a foot and a half....my bad.
You KNOW how us "ricers" like to exaggerate eveything....lke how those stickers get us 10 extra hp, when everybody knows it's only 5.