What size travel laundry bag should I buy?

For a single traveler on a 1–2 week trip, verified-purchase reviewers consistently say a 24" x 36" drawstring bag (roughly 80–120L) is more than enough and even holds 3–4 loads at the end of a trip. For families, college dorm runs, or laundromat hauls, larger 100L+ backpack-style bags get the strongest verified-purchase feedback.