Start by measuring the total area of your patio, then map out how much space you're willing to dedicate to seating. A good rule of thumb is to leave at least 18-24 inches of clearance around the sectional for walkways and between other furniture pieces. Consider what else you'll include - like a dining table, coffee table, or fire pit -- and how much space each element will need.
If your patio is small or shared with other functions, opt for a compact or L-shaped sectional that fits along a corner or wall. For very limited layouts, you might even consider a 3-piece outdoor bar set to save space while still offering style and function. For larger spaces, U-shaped or modular designs can fill the area more fully and accommodate more guests. Measuring with painter's tape or cardboard cutouts can help you visualize the layout before purchasing.