A lumbar pillow is the long rectangle that finishes a pillow arrangement. It's the last thing you place and the first thing people notice, which is why getting the size right matters more than it does for any square. This guide covers every standard lumbar pillow size, which one belongs on a sofa, a chair, or each bed size, the insert rule that's different from squares, and three ways to style one once you've chosen it.
Standard lumbar pillow sizes
Lumbar pillows run wider than they are tall, usually in a 1:1.5 to 1:4 ratio. These are the sizes we sew and the ones you'll find across most designer lines:
| Size | Shape | Best for | Insert |
|---|---|---|---|
| 12 x 16 | Compact | Accent chairs, small benches, nursery gliders | 12 x 16 |
| 12 x 20 | Petite | Armchairs, loveseats, reading chairs | 12 x 20 |
| 14 x 20 | Classic | Sofas, twin and full beds, most chairs | 14 x 20 |
| 12 x 24 | Slim long | Sofas, queen beds, window seats | 12 x 24 |
| 14 x 36 | Wide | Queen and king beds, sectionals, long benches | 14 x 36 |
| 12 x 48 | Extra long | King and California king beds, wide sectionals | 12 x 48 |
Shop each size directly: 12x20, 14x20, 12x24, 14x36, and 12x48.
The insert rule for lumbars is different
For square pillow covers we always say size the insert up two inches. Lumbars are the exception. A lumbar insert should match the cover exactly: a 14 x 36 insert in a 14 x 36 cover. Lumbars are long and narrow, so an oversized insert bunches at the ends and rounds the corners instead of filling them. Matching the size keeps the shape crisp and the pillow lying flat.
Our down alternative inserts come in every lumbar size above, hold their shape on a sofa that gets used, and are hypoallergenic and washable. Find them all in the pillow insert collection.
Which lumbar size for a sofa?
Match the lumbar to the sofa's width and to the squares already on it.
- Loveseat or apartment sofa (under 72"): one 12 x 20 or 14 x 20, centered.
- Standard sofa (72–90"): one 14 x 20 or 12 x 24 centered in front of two 20 x 20 or 22 x 22 squares.
- Large sofa or sectional (90"+): one 14 x 36 centered, or two 14 x 20s, one at each end, in front of 22 x 22 or 24 x 24 squares.
The lumbar should be narrower than the pair of squares behind it so you see both. A 14 x 36 in front of two 20 x 20s hides most of them; step the squares up to 24 x 24 or the lumbar down to 12 x 24.
Which lumbar size for a bed?
On a bed, the lumbar is the front row, centered in front of the squares and sleeping pillows.
| Bed | Mattress width | Lumbar size |
|---|---|---|
| Twin | 38" | 14 x 20 |
| Full | 54" | 12 x 24 or 14 x 20 |
| Queen | 60" | 14 x 36 or 12 x 24 |
| King | 76" | 14 x 36 or 12 x 48 |
| California king | 72" | 14 x 36 or 12 x 48 |
For a king, a 12 x 48 spans about two-thirds of the mattress and reads intentional; a 14 x 36 leaves more of the squares visible. Both work. Our king bed pillow guide and euro pillow size guide cover the rows behind the lumbar.
Three ways to style a lumbar pillow
1. Pair it with a throw
Some surfaces only have room for one pillow. Drape a throw blanket over one arm of the chair or sofa and set a single 12 x 20 or 14 x 20 lumbar against it. Choose a different texture than the pillow so each stands out: a chunky knit against linen, or a wool throw against velvet.
2. Layer it in front of squares
This is the classic arrangement. Two or three squares at the back, one lumbar centered in front. Vary size, pattern, and texture across the set so nothing reads as a matched pair. Keep the busiest print on one square and let the lumbar be a solid or a subtle stripe. Our pillow sets are built this way if you'd rather skip the guesswork.
3. Double up
Two lumbars can replace a whole arrangement. Layer a 14 x 20 in front of a 14 x 36 on a bed, or lay two 14 x 36 lumbars side by side across a sectional. It's cleaner than a stack of squares and works especially well in modern and minimal rooms.
Lumbar pillow covers we reach for
Every cover below is sewn in the USA, in stock, and offered in at least one lumbar size.
- Black and White Farmhouse Stripe — 12x20, 14x20, and 14x36. The workhorse lumbar for farmhouse and coastal rooms.
- Dylan — 12x24, 14x20, and 14x36 in heavyweight rust linen. Warms up a neutral sofa instantly.
- Verona Olive — 14x20 and 14x36 lumbar in Zak + Fox linen. The bed lumbar in several of our sets.
- Florence Navy — 14x20 in navy jute cotton. Grounds cream and white bedding.
- Grain Sack Wide Stripe — 12x20, 12x24, 14x36, and 12x48. Vintage French stripe in every lumbar length.
- Cream Mudcloth — 12x20, 14x20, 14x36, 12x24, and 12x48. Authentic African mudcloth with hand-stitched texture.
Browse the full range in throw pillow covers, or start with size in the collections linked above.
Quick answers
What is the most common lumbar pillow size? 14 x 20 for sofas and 14 x 36 for beds.
Should a lumbar insert be bigger than the cover? No. Match it exactly. Sizing up is for square pillows only.
What size lumbar for a king bed? 14 x 36 or 12 x 48, centered in front of the squares.
Can I use two lumbars instead of squares? Yes. Two lumbars side by side on a sectional, or a small one layered in front of a large one on a bed, both read finished.
