When designing an inviting outdoor seating area, the height of showcases or side tables near sofas plays a crucial role in both functionality and aesthetics. The ideal height typically ranges between 18 to 24 inches (45-60 cm), allowing easy access to drinks or decor while maintaining visual harmony.

For low-profile outdoor sofas (under 30 inches tall), opt for showcases around 18-20 inches to avoid awkward reaching. Standard-height sofas (30-34 inches) pair best with 20-22 inch surfaces, while deeper sectionals may require taller pieces up to 24 inches.

Consider these key factors:

1. Usage Purpose - Lower heights (18") work for drink placement, while taller surfaces (24") better display decorative items

2. Proportion Rules - Keep showcase height within 2-3 inches of the sofa armrest for visual balance

3. Material Matters - Weather-resistant materials like teak or powder-coated metal ensure durability

For layered arrangements, combine different heights - perhaps a 20-inch ceramic stool next to a 22-inch wooden crate. This creates dynamic visual interest while maintaining practicality. Always test arrangements before finalizing - sit on your sofa and check if the surface feels natural to reach.

Remember, these measurements serve as guidelines rather than strict rules. Your personal comfort and the specific design of your outdoor furniture should ultimately dictate the perfect showcase height for your space.