Most listings show a 26" x 26" square euro insert as the common size.
Firmness varies by fill: polyester/microfiber inserts tend to be medium density, while feather-filled inserts are described as firmer.
Care depends on the fill: many polyester/microfiber inserts and covers are machine washable and tumble-dryable, while feather-filled options typically recommend dry cleaning or line/flat drying.
Loft varies by product: shown examples range from about 3 inches (feather options) up to around 8 inches, so expect a range in that area depending on fill and construction.
Most euro shams use a hidden zipper—commonly located at the bottom—to remove or replace the insert.
Common removable cover materials in these listings include 100% French linen for shams and 100% cotton percale for insert encasements.
Options vary: some euro inserts are sold as a single piece (Number of Pieces: 1), while others are offered as a two-pack (2 pk / set of 2).
