How to Choose Needle Size in Garment
Noor Ahmed Raaz
Specialized in Apparel Manufacturing
Owner and Editor in Chief Textile Merchandising
Asst. Prof., Department of Textile Engineering
Atish Dipankar University of Science & Technology
Email: textilemerchandising1@gmail.com
Needle Size:
Normally a sewing needle consists a pointed tip with a long slender tool. The needle is the main part of the sewing process in the apparel industry without needle sewing process can’t imagine. Generally the needle size varies in fabric, nature, thickness, appearance, machine types, design, etc. There are two types of needle size appearance:
- Metric System (Nm).
- Singer System.
Most of the time needle size is changed by the manufacturers, but the metric system is the simplest and broadly used system for finding the needle size. The metric system is also denoted by Nm
1. Metric System (Nm):
- This process is most easy and very working method.
- Needle size is expressed by measuring the diameter of the middle of needle blade.
- The appearance is given below:
Needle size = (Blade dia in mm X 100) Nm
- As for example, if Blade dia is 0.8 mm, then:
Needle size = 0.8 mm X 100 = 80 Nm

Different parts of sewing needle
2. Singer System:
- In case of singer system needle size is expressed through a number as like, 5,7,9,10,11,12,13,14,15,16,17.
- Needle system number more, needle coarser.
Relation between Metric and Singer System:
Metric No. | Singer No. |
55 | 7 |
65 | 9 |
75 | 10/11 |
80 |
12 |

Mohammad Noor Nabi, known by his author name Noor Ahmed Raaz, is a PhD Fellow at Bangladesh University of Textiles (BUTEX) and the Founder & Editor of Textile Merchandising. He is also an Assistant Professor and Chairman of the Textile Engineering Department at a renowned university in Dhaka, Bangladesh. His research focuses on textile innovation and sustainability. Awarded the Research & Development Fellowship twice from the Ministry of Science & Technology in Bangladesh, Noor Ahmed Raaz is dedicated to advancing textile engineering through education, research, and industry collaboration. For inquiries or collaborations, contact Noor Ahmed Raaz via email at textilemerchandising1@gmail.com or WhatsApp at +8801673758271.