Fence height for khaki campbell ducks

[quail2000]

Hi - I have some hatching eggs coming and want to build a fence to "protect" my driveway from the ducks once they're out of the brooder - I had ducks before and kept them in a pen at night, but free ranged them during the day, and plan to do the same. I was thinking a foot and a half would be high enough - does that sound right? I plan to buy this plastic mesh that's cheap, and use that along with stakes driven into the dirt.
Thanks

 

[FrostRanger]

if you're wanting to just keep them out, I'd go 3 feet