How big should a laundry hamper be for one person versus a family?

Across the reviewers we read, a single person can usually get by with a 40-60L hamper that holds roughly one wash load, while couples and small families gravitate toward 75-100L sizes. Larger 90L+ or multi-compartment baskets are recommended by community threads for households that wash less frequently or want to pre-sort darks and lights.