I am a huge fan of Downeast Basics knee-length skirts. Every seasons they come out with new ones, even cuter than the last! This is where most of my personal money goes but being 5'11 I have to seize great modest skirt deals where I can.
Generally I try to balance out my small waist and big hips with an A-line skirt and most preferably with a lower or drop waist. These skirts below all fit that bill and have been super flattering on me and my hips. Even the blue/white polka dot one can be worn lower if you buy a size bigger, which I did and it fits perfectly. I would highly recommend each and every one of these skirts for fit, color, comfort, and fabulousness :)
I do however really like Downeast Basics line of straight/pencil skirts, I just have not been brave enough to try them. Here are some of their new skirts I would love to try, if I ever get the courage to let my hips into a straight cut skirt: