If a group of articles meets the following requirements then that group of articles may be regarded as a set of articles under the Designs Act, 2000:

Ordinarily on sale or intended to be used together.
All having common design even though articles are different (same class).
Same general character.
Generally, an article having the same design and sold in different sizes is not considered as a set of articles. Practical example: “Tea set”, “Pen set”, “Knife set” etc.