Bedding Sheets & Pillows Design Tip: For Euro pillow inserts, I use 28″ inserts for 26″ covers.For throw pillow inserts, size up on the insert as well (i.e. I use 24″ pillow covers for 22″ pillow covers). Duvet Inserts I personally use the oversized duvet insert (i.e. oversized king size for my king duvet cover so it’s extra fluffy!) Duvet Covers Comforters Coverlets & Quilts Bed Blankets & Throws Euro Shams Throw Pillows & Covers