A continuous strand extended in a longitudinal direction thereof, wherein
- the continuous strand is in a form of:
- a simple strand that has rotational twisting produced by rotations of a plurality of filaments and is extended in the longitudinal direction;
- or
- a composite strand that has cross-twisting produced by revolutions of a plurality of simple strands, braiding, or cross-twisting and braiding the plurality of simple strands,
- the simple strand, and each of the plurality of simple strands constituting the composite strand, comprises 40 to 4,000 filaments made of one or more types of polymer components selected from an amorphous organic polymer, a semi-crystalline organic polymer, or a polymer alloy thereof,
- each of the simple strand and the composite strand has a cross-sectional shape of a circular shape, an oval shape, and a polygonal shape selected from a triangle, a quadrangle, and a pentagon, and
- when the cross-section shape is circle or oval, a diameter of the circle or a longest diameter of the oval is in a range of 0.2 cm to 3.0 cm, and
- when the cross-section shape is a polygon, a length of at least one side of the polygon is in a range of 0.2 cm to 3.0 cm,
- each of the simple strand and the composite strand further comprises:
- a pencil normal (PN) section extending along the longitudinal direction thereof and having a first cross-sectional area of a constant size;
- two first pencil tapering (PT) sections respectively extending from both ends where PN section ends and are tapered in such a way that cross-sectional areas decrease;
- two second PT sections respectively extending from an end of one of two pencil connection (PC) sections each having a second cross-sectional area of a constant size which is smaller than the first cross-sectional area, wherein each of the two second PT sections is tapered in such a way that its cross-sectional area increases from the second cross-sectional area again;
- and
- the two pencil connection (PC) sections each connecting one of the first PT sections and one of the second PT sections that are adjacent to each other,
- when a section of bilateral symmetry including the PN section and the two first PT sections respectively linked to both ends of the PN section is set as one cycle, each of the simple strand and the composite strand repeatedly comprises two or more multiple cycles, each of the one cycles which are adjacent to each other is connected by the PC section, and
- when a part of the one cycle, having only one first PT section and including all or part of the PN section of the one cycle, is cut to separate the part of the one cycle from each of the simple strand and the composite strand, and lengths of the filaments thus separated are measured in the longitudinal direction while maintaining textures and waves imparted to separated filaments, a difference Ld between a length of a longest filament Lmax and a length of a shortest filament Lmin, and a length Lpt of the first PT section included in the separated part of the one cycle are not equal to each other, wherein the continuous strand is used for making a wig.