That's a great question! For a small family in an apartment, I'd generally recommend an outdoor trash bin with a capacity between 20 to 35 gallons. This size range is usually the sweet spot. Let me break down why.
First, consider your weekly waste volume. A typical small family of 2-3 people often generates about one standard kitchen bag of trash every few days. A 20-gallon bin can hold roughly 2-3 full bags, which is perfect if you take the trash out frequently. If your schedule means fewer trips to the communal dumpster, or if you have a baby (hello, diapers!), then leaning toward a 30-35 gallon bin gives you more flexibility without becoming oversized for an apartment balcony or storage closet.
Space is your biggest constraint. Measure your balcony, patio, or designated storage area. A sleek, tall 30-gallon bin might fit perfectly in a corner. Also, check your building's rules—some have guidelines on bin appearance or placement.
Don't forget recycling! Many families benefit from having two separate, smaller bins (e.g., 12-15 gallons each) for recyclables, rather than one massive bin for everything. A compact dual-bin system can be more efficient.
Ultimately, my top advice is to track your trash for a week. See how many bags you fill. That real-life data will tell you more than any generic recommendation. A 20-30 gallon bin is often the most practical choice, balancing capacity with the limited space of apartment living.