Choosing a liner for a non-standard outdoor trash can can be frustrating, but it's totally manageable with the right approach. The key is precise measurement. First, grab a tape measure. You'll need the height (from the bottom inside to the top rim), the diameter (width across the top opening), and the circumference (distance around the top). For rectangular cans, measure the length and width of the opening and the depth. Write these numbers down.
Armed with your measurements, you have several options. Many online retailers and specialty stores sell liners in a wide range of dimensions beyond the typical kitchen sizes. Look for "contractor bags" or "heavy-duty liners," which often come in larger, more varied sizes and are thicker to withstand outdoor use. If you can't find an exact match, choose a liner slightly taller and with a larger circumference than your can. A bag that's a bit too big can be tucked over the rim, while one that's too small will slip in.
For a truly unique size, consider custom liners from packaging suppliers. While more expensive, they guarantee a perfect fit. Alternatively, use a standard liner that fits the depth and secure it with a bungee cord around the rim to prevent it from falling in. Always prioritize thickness (measured in mils) for durability against rain, sharp edges, and heavy debris. A little time spent measuring saves you from leaks, torn bags, and hassle later on.