Are you talking about decorative pillows? I just bought some covers and now I'm having a brain fog...I think the size I bought was the "European" which are a perfect square, I think 20x20. Someone correct me if I'm wrong.

But when I did a search all I found was 20 x 20 for the square pillows.

When my covers came in my 20 x 20 pillow seemed too small for them.

Yes, they are decorative pillows in a perfect square. I have found numerous options of inserts and I am trying to avoid buying the wrong thing. Sounds like, I need 20X20 pillow inserts for 18X18 covers. Thanks

Helene is right and I learned that the hard way after looking at throw pillows I didnt like *for some reason* for two years.

I just ordered all new faux down inserts for my couch and I LOVE them. Ordered them 2 inches bigger but could have gone another 2 I think- maybe. Anyway, they are great and were only like 7 dollars each for 24 by 24 inch. Found them online.

Depends what type of filling you want. If the pillowcase is 18 x 18 and you want foam, get 18 x 18 otherwise it will feel a bit too firm. If you plan to use duck feather pillows, get the 20 x 20. Down is really soft, so you could go bigger still.

oakley, euro size is 25 by 25, used for bed shams usually, although I use mine on a sofa.

Thanks Mitch! I prefer that size for my sofa in case I ever need to take a catnap. :)

Blubird, I sure wish I knew to buy a couple of inches smaller in the cover before I bought a pair.

Seriously, does anyone know of an online store that sells a lot of textiles, like pillow covers with many colors and patterns to choose from?

I'm looking for checks and plaids and they're really hard to find, or not the color I want.

I found this while searching for an answer regarding pillows. I appreciate everyone's input! This was the last website I expected to find this kind of information!! :0)

i just bought 3 gorgeous Orla Kiely pillow cases 16 x 20 - what size insert do you suggest? thanks!

Inserts should be 2" bigger than their exterior measurement.

If you order any pillow covers through Etsy, beware that a cover listed as "fits 18x18 insert" is not necessarily a 16x16 cover. I learned the hard way and just bought more fill, opened the inserts and added enough to fill out the cover.

I have 2 24 x 24 feather pillow inserts. Should I order 24x24 pillow covers?

I have a 17x16 3/4 cover. I’m buying a feather and down insert. What is the proper size?

i ordered pillow inserts two inches larger than the covers and I think they look too stiff! They are so stuffed, they look like polyester filled pillows. I wish I had not gone 2" larger...Maybe one inch bigger might have worked or just the same size. This would go against the standard advice...Live and learn.

I like my pillows to be more floppy so I get the same size cover and only down inserts.