The 67x12mm Dressed MDF sits nicely between a narrow finishing strip and a broad moulding. That makes it useful when 42mm feels a little small but you don’t want to jump straight to a 92mm face. The profile itself is deliberately plain, which works well in rooms where the trim isn’t meant to become a design feature. Around an internal doorway or window, the 67mm width gives a clear border while the 12mm thickness keeps things relatively slim. Planning to use it throughout several rooms? Work out the total lengths before ordering and remember to leave a little extra for cuts and joins.