One of the top questions customers ask when shopping for pillows is whether pillow inserts should be larger than covers. It’s a small detail, but it makes a huge difference in how your pillows look and feel. Let’s explore the golden rule of pillow styling and when to follow it.
The General Rule
For square pillows, always size up your insert by 1–2 inches compared to the cover. For example:
- 18x18 cover → 20x20 insert
- 20x20 cover → 22x22 insert
- 22x22 cover → 24x24 insert
Why Sizing Up Matters
Oversized inserts fill the cover fully, creating a plump, high-end look that designers love. A pillow with the exact same insert and cover size often looks flat and underwhelming.
Exceptions to the Rule
For lumbar pillows (like 12x20 or 14x20), inserts should match the cover size. Sizing up can distort the rectangular shape, making it look lumpy.
Material Considerations
Down and feather inserts naturally compress, so sizing up is especially important. Polyester fills hold their shape more firmly, so in some cases you can match cover and insert size.
Visual Examples
Our Olive Green Linen Pillow Cover looks its best when paired with a 22x22 insert inside a 20x20 cover. Notice how the pillow appears full and inviting rather than slouchy.
When you buy a new pillow cover, always consider the right insert size. Explore our Pillow Combos for ready-made arrangements that are perfectly sized.
The simplest styling secret is this: size up your pillow inserts for squares, match for lumbars. It’s a detail that transforms your space from everyday to designer-worthy.