
The selection of appropriately sized decorative pillows is contingent upon the specific dimensions of the sofa. The guiding principle is to maintain a sense of scale and proportion between the pillows and the furniture.
Based on the provided information, different types of sofas require different pillow dimensions. For a regular or standard-sized sofa, the most suitable square pillow sizes are 20x20 inches and 22x22 inches. These can be paired with lumbar pillows that measure between 11 and 14 inches in height and 19 to 20 inches in width.
For smaller sofas, settees, or those with lower backs, pillows should be scaled down to avoid overwhelming the furniture. Recommended square sizes for these pieces include 17x17, 18x18, and 20x20 inches. Correspondingly, lumbar pillows should range from 10 to 13 inches in height and 12 to 19 inches in width.
Conversely, large or deep sofas necessitate larger pillows to appear balanced. Optimal square pillow sizes are 20x20, 22x22, and even 24x24 inches. Lumbar pillows for these larger sofas should be between 13 and 15 inches high and 20 to 22 inches wide. For sectional sofas, a versatile range of square pillows from 18x18 inches to 22x22 inches is appropriate, with lumbar options typically falling between 11 to 15 inches in height and 19 to 21 inches in width.


