For a light or ultra-light action spinning rod, I want one that is at least 7 foot unless it is for shooting docks then a shorter one works best for me.
A few years ago I got a catalog from Sportsman's Guide, which is known much more for hunting and military surplus gear. They had a deal on Rapala 7' ultra-light spinning rods for $29.99 each. At that time I didn't know Rapala even made rods and figured it was some cheap knock-off. I ordered one anyway. It is without a doubt the best spinning rod for light line I have ever held and I wish I had a dozen of them. I am a cork handle man and want a rod I can throw a 1/8 oz jig out of sight if necessary on 4-6 pound line.
You would do best to go into a big box outdoor store and handle as many light/ultra-light rods as possible. You will know the one that works when you pick it up.