Measure the seating group
Measure the full sofa-and-chair group, including the feet you want on the rug. Two common layouts place either the front legs or all legs on it. Consistency usually looks deliberate. A chair awkwardly perched on one corner can feel disconnected even when the rug is large.
Standard sizes are starting points
A 6×9 ft rug is approximately 183×274 cm; 8×10 ft is 244×305 cm; 9×12 ft is 274×366 cm. These are conversions, not assurances that a particular size fits. Handmade pieces can vary from nominal sizes, so use the actual product measurement.
Worked example: a 220 cm sofa
If you want 25 cm of rug visible beyond each arm, start with 220 + 25 + 25 = 270 cm in width. A rug with a 274 cm side might satisfy that part of the plan. Depth is a separate test: include the coffee table, front feet and opposing chairs. Rotate the outline if that creates a better furniture zone.
Sectionals and circulation
Treat a sectional and chaise as one footprint. Check whether the chaise will hide the pattern or leave an unusually narrow strip. Mark door swings, vents and the main walking route. An elegant rectangle is not useful if its edge sits where people repeatedly catch it.
The final tape test
Use removable tape appropriate for the floor to mark the exact rectangle. Sit in each seat, stand up and walk around the coffee table. Check the view from the entrance. Compare the next size up before ordering, and remember to include the pad in height and door-clearance checks.
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