The ideal trimmer line size is usually between 0.065 and 0.080 inches for light-duty trimming jobs, such as edging your lawn or cutting soft grass around roads, sidewalks, and flower beds.

We're starting with the string trimmers that use a 0.080" line because they make up the vast majority of Ryobi's lineup. In fact, if you own a Ryobi electric string trimmer, chances are it will ...