Swags and tails should be hung from a top-board approximately 7 to 13cm (3 to 5″) deep and 2.5cm (1″) thick placed above the curtain track and secured to the wall with fixing brackets. When ordering, it is important that the lengthof the top board (M) and return size (N) are stated. The overall drop (O) of the tails must also be specified. In the case of a bay window please state whether the bay is angled or curved.