How to size your pillow covers and inserts

In most cases, for square pillows, I recommend 20x20 or larger pillow covers. For lumbar pillow covers, I typically recommend 11x22 or larger. The perfect size is dependent on scale, location, and other factors.

Pillow covers need a slightly larger insert for a full look. (No wimpy pillows ever!) Here are suggested combinations for pillow cover and insert sizes:


17x17 cover --> 18x18 insert

18x18 cover --> 20x20 insert

19x19 cover --> 21x21 insert

20x20 cover --> 22x22 insert

21x21 cover --> 23x23 or 24x24 insert

22x22 cover --> 24x24 insert

24x4 cover --> 26x26 insert

26x26 cover --> 28x28 or 30x30 insert


11x15 or 12x15 cover --> 12x16 insert

11x17 or 12x17 cover --> 12x18 insert

11x18 or 12x18 cover --> 12x20 insert

11x19 or 12x19 cover --> 12x21 insert

11x21 cover --> 12x22 insert

11x22 or 12x22 cover --> 12x24 insert

12x36 cover --> 13x39 insert (custom size)

12x48 cover --> 13x52 insert (custom size)

12x18 cover --> 13x20 insert

12x19 cover --> 13x21 insert

13x18 cover --> 14x20 insert

13x20 cover --> 14x22 insert

13x22 cover --> 14x24 insert

13x33 or 14x33 cover --> 14x36 insert

14x36 cover --> 15x39 insert (custom size)

14x48 cover --> 15x52 insert (custom size)

14x20 or 15x20 cover --> 15x22 insert

14x28 or 15x28 cover --> 15x30 insert

15x22 cover --> 16x24 insert

15x24 cover -> 16x26 insert


Pillow covers are measured from inside seam to inside seam. Once they are stuffed with an insert, the finished dimensions will usually be an inch or two smaller.



In most cases, I recommend down/feather inserts. I like 10% down/90% feather inserts, which are firm, yet soft. They work well if you like a "pillow chop." Faux down is the next best, if you have allergy issues. If your insert has lumps and bumps, please replace it!

Usually the best way to find the size inserts you need is to do an Google search. Just type "15x22 pillow insert" into the search bar, for instance. Any of the sizes listed above (with the exception of the ones noted as "custom size") can be found via online retailers. Email me at if you need insert help.