When selecting an outdoor sofa, comfort is just as important as style. One key factor often overlooked is the back height, which plays a crucial role in ensuring relaxation and support. The ideal back height for an outdoor sofa typically ranges between 28 to 32 inches (71 to 81 cm), as this provides adequate lumbar support while allowing for a relaxed posture.

A taller back (around 32 inches) is perfect for those who prefer leaning back or napping outdoors, offering full spine alignment. Meanwhile, a slightly shorter back (28–30 inches) suits casual seating, encouraging a more upright position for socializing. The angle of the backrest also matters—a slight recline of 100 to 110 degrees enhances comfort by reducing strain on the lower back.

Materials matter too—weather-resistant cushions with high-density foam maintain shape and support over time. For added versatility, consider modular sofas with adjustable backrests to customize your comfort.

Ultimately, the best back height depends on your usage. Test different heights before purchasing to ensure your outdoor sofa blends aesthetics with ergonomic comfort.