Loomé & Rug

Sizing · 80 vs 108 square feet

8x10 vs 9x12: which one is right

These two sizes account for most living room rug purchases in the US, and most of the regret. The difference is smaller than it sounds and matters more than it looks.

Loomé & Rug · Updated August 2026

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An 8'×10' is 80 square feet. A 9'×12' is 108. That is 35% more rug, and in practice about one extra foot on every side.

One foot does not sound like a decision worth agonising over. It is, because that foot is almost exactly the depth of a sofa's leg-to-leg span. It is the difference between furniture standing on the rug and furniture standing beside it.

The same 14 by 12 foot room shown twice, once with an 8 by 10 rug and once with a 9 by 12 rug With the 8 by 10 rug the sofa's back legs sit on bare floor. With the 9 by 12 rug in the same room, the whole sofa and both chairs sit on the rug. 8' × 10' 80 SQ FT FRONT LEGS ON SOFA BACK ON BARE FLOOR 9' × 12' 108 SQ FT ALL LEGS ON WHOLE GROUP ON THE RUG SAME ROOM: 14' × 12'
Identical room, identical furniture, one size apart. The 9'×12' pulls the sofa fully onto the rug; the 8'×10' leaves its back legs on the floor. Both are correct arrangements — they are just different ones.

The test, in three steps

1. Measure the room, then subtract the margin

Take your wall-to-wall dimensions and subtract 36" from each — that leaves 18" of bare floor on both sides. Whatever remains is your maximum rug.

A 12'×14' room gives you 9'×11'. So a 9'×12' is one foot too long, and an 8'×10' is the honest answer.

A 13'×16' room gives you 10'×13'. The 9'×12' fits comfortably.

2. Measure the sofa

Add 12" to your sofa's length. If that exceeds 8', the 8'×10' is already working hard. A 90" sofa plus margin is 102", which is 8'6" — over the line.

Sectionals almost always push you to 9'×12'. Measure the outer footprint including the chaise.

3. Decide which arrangement you want

If you want every leg on the rug, you are buying 9'×12' unless your furniture is unusually small. If front legs on is fine — and it is fine, it is what most American living rooms do — 8'×10' does the job.

The tiebreaker

If both sizes fit your wall margin and you cannot decide, buy the 9'×12'.

Undersized rugs are the far more common regret, and a room almost never looks worse for having more rug in it.

What the extra size costs

Roughly 35% more area, and pricing tends to track area fairly closely, so expect the 9'×12' to run 30–50% more than the same rug in 8'×10'. Weight goes up proportionally too, which matters for two practical reasons: moving it to vacuum underneath, and returning it if you get the size wrong.

That second point is worth sitting with. A 9'×12' wool rug is a heavy, awkward object. Some retailers charge return shipping on oversized items, and the cost is not trivial. Tape the size out on your floor before ordering.

The sizes between them

There are options if neither fits. 8'×11' and 9'×11' exist but are stocked far less widely, so you are trading selection for fit. Square-ish rooms sometimes take 10'×10' better than either rectangle.

Above 9'×12' the next real step is 10'×14', which suits open-plan spaces and large great rooms.

Quick reference

Which size, by room dimension
Your roomBuyWhy
11'×13'8'×10'9'×12' leaves under 12" to the wall
12'×15'8'×10'Comfortable margin, front legs on
13'×16'9'×12'All legs on with 18" to spare
14'×18'9'×12' or larger10'×14' if the seating group is deep
Sectional, any room9'×12'The chaise adds depth an 8'×10' rarely covers