Using a tiny rug in a small living room is the fastest way to make the space feel cramped. When a rug is too small, your furniture floats like an island. Interior designers use a basic math trick to fix this and make rooms look bigger.
Target the 60 to 70 percent rule. Your rug needs to cover roughly 60 to 70 percent of the seating area footprint. If your couch spans 80 inches, extend the rug 10 to 12 inches past each arm. This creates a boundary that expands the floor space visually.
Treat it like a CSS grid bug. If your container is too small, elements overflow and crowd each other. Give your furniture room to breathe by establishing proper padding on all sides. Another mistake is floating all furniture completely off the rug. Get at least the front legs of your sofa and armchairs resting on the fabric to tie the seating zone together.
Test sizes with blue painter's tape or string before buying anything (see writeup). Map the dimensions right on your floor. Walk around, open doors, and check if your coffee table fits inside the boundary. If the tape blocks a door swing or heating vent, scale down the numbers.
Mastering scale transforms a tight layout from cluttered to intentional. Measure twice and respect the grid.
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