Abstract: The hook 5, as shown in FIG. 3, FIG. 4 and FIG. 5, serves to latch between the pearls 2 at an optional position in the above-defined predetermined section of the necklace 1. Referring to FIG. 3 and FIG. 5, the hook 5 has an open end 51 whose opening is smaller than the outer diameter of the spacers 4. Opposite to the open end 51 and at an innermost area of the hook 5, the hook 5 also has a spacer fitting area 52 which is defined by a curve that matches an external circumference of the spacers 4. Specifically, as shown in FIG. 5 a width dimension of the spacer fitting area 52 is substantially equal to a width dimension of the spacer. The hook 5 has a smooth surface and such a thickness as to be comfortably inserted between the pearls 2. Thus, the hook 5 avoids damaging the pearls 2.

Abstract: A necklace has an adjustable loop size so that anyone having a thick or a slender neck can wear a necklace of one size so which is adjustable that it fits the wearer best. A hook formed by bending a material is provided at an end of the string necklace, formed by connecting pearls together with a string. A loop is formed by engaging the hook in a valley portion between any adjacent pearls. By engaging the hook in different valleys, it is possible to change the size of the necklace loop freely, so that it is possible to form a loop of the best size for each wearer.

Abstract: A necklace has an adjustable loop size so that anyone having a thick or a slender neck can wear a necklace of one size so which is adjustable that it fits the wearer best. A hook formed by bending a material is provided at an end of the string necklace, formed by connecting pearls together with a string. A loop is formed by engaging the hook in a valley portion between any adjacent pearls. By engaging the hook in different valleys, it is possible to change the size of the necklace loop freely, so that it is possible to form a loop of the best size for each wearer.