Bedding & Bath · Decorative Throw Pillows
What insert size should I use for an 18x18 cover?
Reviewer consensus
Most reviewers recommend sizing the insert up by one or two inches over the cover to avoid the limp, under-stuffed look, so an 18x18 cover often pairs best with an 18x18 or even 20x20 down-alternative insert. The Utopia Bedding 18x18 inserts are the most-reviewed option in this pool and are frequently bought specifically to plump out budget covers.