Size matters less than poppyness. But you cant' say "this is the size for a double front" to each his own. For you it might be for me it might not. And fuck double fronts they look stupid.
thanks for the replies guys ... but the only problem is that i dont have any backcountry around me... im headin up to whiteface tomorrow and thats where im thinkin of throwin it... i dont even know if they have a hit thats 55ft.
55 is like the bare minimum I would say to "safely" get it around... for your first time I would try it over something like 65 ish that way if you panick in the air or don't throw it as hard as you need to you still have a bit of extra time to pull it around.
Bro out of experience make sure you try this one landing in pow first because once you go around for the second flip its REALLY easy to lose sense of where you are in the air.