What Size Pillow Insert for 14×20 Cover? | The Fit That Works

For a 14×20 cover, use a 14×22 insert for a full look, though a 14×20 insert gives an exact, tailored fit.

Choosing the right pillow insert for a 14×20 cover comes down to one question: do you want a crisp, exact fit or a plump, luxurious one? A 14×20 lumbar pillow cover measures 14 inches by 20 inches, and the insert you pair with it changes the final look dramatically. The two leading size guides agree on the fuller route, but your preference for firmness plays a role too.

Here’s what the experts recommend, what to avoid, and how to pick the insert that makes your lumbar pillow look like it belongs in a catalog.

Why Insert Size Matters More Than You Think

An insert that’s too small leaves your cover sagging with empty corners; one that’s too large distorts the shape and strains the seams. Unlike square pillows, where a 2-inch oversize insert is standard practice, lumbar pillows like the 14×20 need a more careful approach because of their elongated proportions.

The fill material changes the math too. Down and feather blends compress easily, so they benefit from a slightly larger insert to hold their shape. Polyester fiberfill holds its structure better, meaning an exact-size insert can still look full. Chloe & Olive’s size guide lists a 14×22 insert as the match for a 14×20 cover, and Eryn Home gives the same recommendation, noting that going 2 inches larger delivers a full, plump look.

The Two Sizes That Work

You have two solid options for a 14×20 cover, and neither is wrong. Your choice depends on the look you’re after.

• 14×20 insert — Creates a tailored, snug fit. The pillow lies flat and neat, ideal for structured decor or lumbar support against a sofa back.
• 14×22 insert — Produces a fuller, plumper pillow. The extra 2 inches of length push against the cover’s ends, giving it that inviting, “squishy” look most people picture when they think of a styled throw pillow.

Home to Sight takes a slightly more conservative stance, recommending a 14×20 insert for a 14×20 cover and calling 14×21 acceptable if the exact size is unavailable — but going no bigger than that. If you choose the oversize route, this is the honest ceiling for this particular cover size.

How to Decide Between 14×20 and 14×22

The best choice comes down to where the pillow lives and what it does. A lumbar pillow that gets leaned on daily — say, on a reading chair — benefits from the firm support of an exact-fit 14×20 insert. A decorative lumbar pillow on a bed or accent sofa looks better with the plump 14×22, since nobody’s weight will flatten it.

Consider your cover’s fabric as well. A stiff, structured fabric like linen holds its shape with an exact-fit insert. A soft, drapey fabric like velvet or cotton looks better slightly overstuffed, since the material needs the extra volume to smooth out wrinkles.

If you’re leaning toward the fuller look, our tested roundup of the best 14×22 pillow inserts covers the highest-rated options for this exact size.

Common Sizing Mistakes to Avoid

Two errors send most people back to the returns page. The first is treating a lumbar pillow like a square one. Square pillow guidance often recommends a 2-inch oversize insert, and while that logic transfers to the 14×22 recommendation, it fails when people push it further — a 14×24 insert in a 14×20 cover distorts the corners and makes the ends bulge awkwardly.

The second mistake is skipping the seller’s own size chart. Different brands cut covers differently; a 14×20 cover from one maker might measure 14.5 inches across, while another runs slightly tight. Chloe & Olive, Eryn Home, and Home to Sight all publish specific insert recommendations for their covers, and those charts exist because guessing wastes time and money.

One final note: inserts settle. A down insert that looks dramatically overstuffed on day one will compress to a comfortable fullness within a week. If you’re between sizes and leaning toward the larger option, the 14×22 gives you room to settle without going flat.