Product review (5 stars): 10 ft. = Perfect Length!
I was afraid that 10 ft. may not be as long as I needed, but I was wrong. This is a very long cord that will allow you to plug your 220v dryer in to your 3 prong outlet from the other side of the room if desired. My brand of dryer is Whirlpool and the cord connected just fine, without issue, though I would expect it to work the same regardless of what specific brand your dryer is. I would recommend just going with the longest cord available, or the 10 ft. one, so that you never have to worry about it being to short in the future. It will not hurt anything if the cord is a little too long, as you can always wind it up and stash the extra length somewhere out of sight. For our basement, I wound up running the cord from the dryer straight up to the ceiling and running it across the room to the outlet, which I also had installed on the ceiling, which makes the finished basement look all that more clean and "non-basement" like!