1) Choice of type.

At present, the main products sold on the market are chemical fiber socks (nylon, card silk, thin elastic, etc.), cotton socks and blends, interwoven, sheep wool, and silk socks. According to the season and the nature of the feet, usually choose nylon socks and towel socks in winter; sweaty feet, cracked feet, choose cotton or blended, interlaced socks; in summer, wear stretch card stockings, real stockings, etc.; spring and autumn should wear thin elastic and mesh socks. Women’s skirts should wear stockings. 　

(2) Choice of size.

The size specification of socks is based on the size of the bottom of the socks (from the heel to the toe). The general size is indicated on the trademark. It is better to choose the same size or a slightly larger size according to the length of the foot, not a smaller one. 　

1·Selection of grade: According to the internal quality and appearance quality, socks are divided into first-class, second-class, third-class (all qualified products) and foreign-class products. Generally, first-class products are used, and second- and third-class products can also be used when the requirements are not high. 　　

2. Selection of key parts: I) The socks and socks should have a large heel and a bag shape, as close as possible to the shape of a person’s foot. The size of the heel of the sock will cause the sock tube to sag after wearing and the sock heel slips to the bottom of the sock. You can’t try it on when you buy, just fold the sock surface and the sock bottom in half from the center line. Generally, the ratio of the sock surface to the heel is 2:3. II) Inspection of the density and elasticity of the sock mouth: the density of the sock mouth should be large, and the width of the sock should be doubled, and the recovery is good. It has small elasticity and is not easy to reset horizontally, which is also one of the reasons for the sliding of socks. III) Check whether the seam head interface is out of needle. Generally, sewing the head of socks is another process. If the needle is removed from sewing, the mouth will be opened when worn. When selecting, look carefully from the seam head to see if the needle is smoothly released. IV) Check for holes and broken wires. Because socks are knitwear, they have a certain degree of extensibility and elasticity. Generally, broken wires and small holes are not easy to find. According to the conditions of the process, it is easy to cause broken wires or holes when the sock is shaped into contact with other objects. Therefore, check the sock bottom and sock side of the sock when purchasing, and lightly pull it horizontally. V) Check the length of socks. Because each pair of socks is optional, unequal length is likely to appear. Generally, each pair of first-class products should be no more than 0.5CM. 　

(4) Identification of regular products and miscellaneous inferior products.

The large-scale hosiery factory has advanced equipment, stable technology and good selection of raw materials. Through various procedures, the quality is stable. In appearance, the fabric has uniform density, thick, pure color, well-shaped and formed, and has a regular trademark. Miscellaneous inferior products are mostly due to simple equipment, manual operation, poor selection of raw materials, thin and uneven fabrics, low density, less color and luster, many defects, poor molding, and no formal trademarks.