The 18-inch rug rule is the clever trick to choose the right size rug for your living room – here's how it works

A pink-painted living room with a cream sofa and a patterned rug.

When it comes to choosing the right rug size for your home, it’s all about balance. You don’t want a rug to be too small or too large. But if you’re not experienced in regularly picking rugs for different spaces, this balance might be a difficult one to strike. Which is where the 18-inch rule comes in.

This method is making rounds on the internet as the golden rule one should abide when coming up with any living room rug ideas. Used less often to prevent any bedroom rug sizing mistakes, the 18-inch rug rule is, in fact, most often used when choosing the right size rug for a living room.