Matching of needle, thread and cloth, can be accomplished with half the effort.

9-11（70-80）

Mainly light and thin fabrics: thin cotton cloth, gauze, thin lace, silk cloth, cotton cloth, linen, mesh cloth, cotton woven clothing, knitted fabrics, textile polyester, shirts, and blouses, etc

Fine thread is made of cotton, nylon, and polyester.

11-14（80-90）

Medium cloth mainly: cotton cloth, satin woven cloth, wood cotton cloth, canvas, double-layer woven clothes, thin wool clothes, etc

Medium size sewing thread is the most common, which is suitable for the size of these fabrics and needles. A polyester thread is used on synthetic fiber materials, and cotton thread is the best on natural fabrics. Boarding and alighting lines must be of the same thickness.

14（90）

Medium-thick fabrics mainly include flannelette, wool cloth, woven clothing material, terry fabric, denim, etc.

16（100）

Heavy fabrics mainly include canvas, woolen fabrics, thick canvas, cloth with cotton seams, denim, padded clothes, etc.

18（110）

Especially heavy fabrics: wool clothes, coat fabrics, padded fabrics, some leather products, and vinyl, etc

Thick line, carpet line.