A header tape arrangement for a curtain, the header tape arrangement being for causing a wave effect in the curtain, the header tape arrangement comprising: a base strip for attaching to the curtain, adjacent to and along an edge of the curtain, the base strip having a rear side for facing the curtain and a front side opposite the rear side; and, a first strip having: a plurality of spaced apart first attaching segments defined as segments of the first strip attached to the front side of the base strip along a length of the base strip; and, a plurality of first pocket segments defined between the first attaching segments, each of the first pocket segments having a pair of spaced apart first fastening points (44a, 44b), wherein, for each of the first pocket segments, the respective first pocket segment is folded to bring together a pair of spaced apart points of the respective first pocket segment, the pair of spaced apart points defining the respective pair of first fastening points (44a, 44b), and the respective pair of first fastening points (44a, 44b) is fastened so as to cause the wave effect when the base strip is attached to the curtain, characterized in that the header tape arrangement comprising a second strip having: a plurality of spaced apart second attaching segments defined as segments of the second strip attached to the front side of the base strip along a length of the base strip; and, a plurality of second pocket segments defined between the second attaching segments, each of the second pocket segments having a pair of spaced apart second fastening points (50a, 50b), wherein, for each of the second pocket segments, the respective second pocket segment is folded to bring together a pair of spaced apart points of the respective second pocket segment, the pair of spaced apart points defining the respective pair of second fastening points (50a, 50b), and the respective pair of second fastening points (50a, 50b) is fastened so as to cause or maintain the wave effect when the base strip is attached to the curtain. a base strip for attaching to the curtain, adjacent to and along an edge of the curtain, the base strip having a rear side for facing the curtain and a front side opposite the rear side; and, a first strip having: a plurality of spaced apart first attaching segments defined as segments of the first strip attached to the front side of the base strip along a length of the base strip; and, a plurality of first pocket segments defined between the first attaching segments, each of the first pocket segments having a pair of spaced apart first fastening points (44a, 44b), a plurality of spaced apart first attaching segments defined as segments of the first strip attached to the front side of the base strip along a length of the base strip; and, a plurality of first pocket segments defined between the first attaching segments, each of the first pocket segments having a pair of spaced apart first fastening points (44a, 44b), wherein, for each of the first pocket segments, the respective first pocket segment is folded to bring together a pair of spaced apart points of the respective first pocket segment, the pair of spaced apart points defining the respective pair of first fastening points (44a, 44b), and the respective pair of first fastening points (44a, 44b) is fastened so as to cause the wave effect when the base strip is attached to the curtain, characterized in that the header tape arrangement comprising a second strip having: a plurality of spaced apart second attaching segments defined as segments of the second strip attached to the front side of the base strip along a length of the base strip; and, a plurality of second pocket segments defined between the second attaching segments, each of the second pocket segments having a pair of spaced apart second fastening points (50a, 50b), wherein, for each of the second pocket segments, the respective second pocket segment is folded to bring together a pair of spaced apart points of the respective second pocket segment, the pair of spaced apart points defining the respective pair of second fastening points (50a, 50b), and the respective pair of second fastening points (50a, 50b) is fastened so as to cause or maintain the wave effect when the base strip is attached to the curtain. a plurality of spaced apart second attaching segments defined as segments of the second strip attached to the front side of the base strip along a length of the base strip; and, a plurality of second pocket segments defined between the second attaching segments, each of the second pocket segments having a pair of spaced apart second fastening points (50a, 50b), wherein, for each of the second pocket segments, the respective second pocket segment is folded to bring together a pair of spaced apart points of the respective second pocket segment, the pair of spaced apart points defining the respective pair of second fastening points (50a, 50b), and the respective pair of second fastening points (50a, 50b) is fastened so as to cause or maintain the wave effect when the base strip is attached to the curtain.