Types of Seam Classes Used in Garment Industries

Last Updated on 13/04/2021

Experiment name:
Production of different types of seam classes.

The process of joining of fabric to make a garment is known as stitching. There are two things involved in stitching process, i. e. stitches and seams. The line where two or more fabrics are joined together is known as a seam. There are six basic types of seam classes which are explained in Table 1.


  1. To know about various classes of seams.
  2. To produce the seams on fabric by sewing machines.
  3. To know the formation & construction process of various seams.

Different types of seam classes:

Seam classes
Table 1: Seam classes
  1. Class-1-Superimposed seam
  2. Class-2-Lapped seam
  3. Class-3-Bound seam
  4. Class-4-Flat seam
  5. Class-6-Edge Neatening (Over Lock)
  6. Class-5-Decorative seam

01) Class-1- Superimposed seam:
The seam of class-1 is called superimposed seam. This is the most common & mostly used seam for joining fabrics. In this seam, two plies of fabric are placed on one another perfectly & then the fabrics are sewn. The sewn edges of the fabrics remain in the same side.

In side seams of shirts, trouser, children wear etc. Piped & French seam are used for decorative purposes.


Super imposed seam

Superimposed seam
Fig: Superimposed seam

02) Class-2- Lapped seam:
The seam of class-2 is called lapped seam. At least two plies of fabric is required to produce this type of seam. The two Sewn edges remain in two opposite sides of the sewing line/seam line.

This class of seam is not mostly used for sewing garments. This seam is used in sewing jeans pants, lunges etc.


Lapped seam

Lapped seam
Fig: Lapped seam

03) Class-3- Bound seam:
The seam of class-3 is called bound seam. For producing bound seam at least two plies of fabric are required. The edge of One ply of fabric is bounded by the other. Folder is used in sewing machine for producing bound seam.

Used in sewing men’s underwear, Guernsey, pants, sleeping suits etc.


Bound seam

Bound seam
Fig: Bound seam

04) Class-4- Flat seam:
The seam of class -4 is called flat seam where zigzag stitches are used by 2-needle sewing machine. In this seam two plies of fabric are placed side by side & then they are sewn together by zigzag stitching.

This seam is widely used in under garments & in knitted items.


Flat seam

flat seam
Fig: Flat seam

05) Class-6- Edge Neatening:
The seam of class-6- is called edge neatening which is used to holds the edge of the fabric such that the yarns of the fabric can not open easily. All the over Lock stitch is edge neatening class seam.

To protect the fabric edge such that the warp yarn of the fabric can not easily open.


Edge Neatening (Over Lock)

Edge Neatening
Fig: Edge Neatening

06) Class-5- Decorative Seam:
The seam of class-5 is called decorative seam. This seam is used in order to decorative purpose. The fabric which we used that would be folded in several times and then according to the under side of the folded part of the fabric stitch can be produced.

Curtains, Table cloths, Furniture wears, Decorative ladies wears etc.


Decorative seam

Decorative seam
Fig: Decorative seam

This experiment is very helpful to us. By this experiment we can learn about various types of seams. This experiment will be helpful for our future practical life. So we should be done this experiment very carefully & sincerely.

You may also like:

  1. Different Types and Classification of Stitches with Pictures
  2. Stitch Length Measurement Technique
  3. Principle of Lock Stitch Formation Techniques
  4. Different Types of Stitches and Their Uses in Garments
  5. How to Determine Seam Strength in Garment Industries
  6. Scope of Seam Engineering to Increase the Seam Strength by Controlling Different Parameters

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