That's a great question! For a standard outdoor trash can, the best fit usually comes down to two main things: size and durability.
First, you'll want to measure your can. Check its height and gallon capacity (like 32-gallon or 44-gallon). Then, look for liners labeled for that specific size. A liner that's too small will slip down inside, and one that's too large is wasteful and floppy. A good rule is to choose a liner that's slightly taller than your can's inner height so you can fold the excess over the rim—this helps secure it.
Material is key outdoors. Go for heavy-duty or contractor-grade plastic bags. They're thicker and much more resistant to tears from sharp debris, bad weather, and heavier loads. Features like drawstrings or flat tabs make tying and removal easier. For messy waste, consider bags labeled as leak-proof or with reinforced bottoms to prevent nasty spills.
In short, the best liner is a heavy-duty one that matches your can's exact gallon size. It might cost a bit more, but it saves you from cleanup headaches later. Happy cleaning