If your gutters are of the K-style design, your choice is either a K-Style Hinged Gutter Screen or K-Style Drop-In Gutter Screen. These units also come in 3-foot sections. Both types are available to fit either 5-inch or 6-inch K-style gutters.
There is also a style of gutter cover in copper material. This is the Gutter Shingle Gutter Cover. This style is installed underneath the bottom course of shingles on the roof. The covers are 3 feet in length.
Two styles of gutter guards are available from most companies. These include the Leaf Out Gutter Guard and the GuttaGard brand. The Leaf Out Gutter Guard comes in 4-foot lengths and is available to fit either 5-inch or 6-inch gutters. The GuttaGard brand also comes in 4-foot sections and is currently available only in a 6-inch gutter size.
The filter type of Gutter Guard is the better than most any type Gutter Guards, more about those tomorrow.