rug edge

What Size Rug Goes Under A Sectional Couch? Large sectional sofas (around 10-14’W x 14’L) need the largest rug you can afford like a 10×14 or 9×12 rug. Average-size sectional sofas (around 8-10’W x 10’L) need a 9×12 or 8×10 rug. Small sectional sofas (around 6-8’W x 8’L) need a 4×6, 5×7, or 6×9 rug.