A door stop is the thin strip of moulding that runs around the inside of a door frame. The door closes against it, which keeps the door sitting flush in the frame and covers the gap between the door edge and the frame. This one is the Eased Two Edges style: a flat face with two softly rounded edges. Made from MDF, which stands for medium density fibreboard: a smooth engineered wood board with no grain and no knots, so it takes paint well.

• What it is: One length of door stop, 14 ft long, sold by the piece.
• Size: 3/8" thick by 1-1/8" wide.
• Profile (the shape the edges are cut to): A flat face with two softly rounded edges. Both edges are the same, so there is no right or wrong way round.
• Finish: Primed white, so a base coat is already on and it is ready for your paint.
• How many pieces: A standard door frame takes about 17 ft of door stop: one length for each side and one across the top. Two lengths cover one door with plenty left over.
• About the photo: we picked an image that matches this trim as closely as we could, so it is a close look at the shape and finish. It is not a photo of the exact piece you receive, and the proportions can differ a little from the real thing, especially between sizes.