In geometry, a cube is a three-dimensional solid object bounded by six square faces, facets or sides, with three meeting at each vertex. A cardboard box could be viewed as a cube.

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A cube has 6 faces, 12 edges, and 8 vertices. What a face/facet of a cardboard box is called in daily life? a piece of wall?

  • You shouldn’t use “a piece of wall” here. The “side” of a box is a complete “wall” of the box, not just a “piece” of it. Jan 24, 2020 at 0:29
  • @OrbitalAussie Thanks for your comments. so, it is just a wall, right?
    – zghqh
    Jan 24, 2020 at 0:47
  • Yes. The four vertical parts can be called either a “wall” or a “side“. Jan 24, 2020 at 4:04
  • @OrbitalAussie Thank you so much! What is this type of top called, which distinguishes from another type of top
    – zghqh
    Jan 24, 2020 at 4:54
  • There is no particular name here, just some possible descriptions, such as (for the box pictured here): “the four flaps forming the top of the box”. And for your other picture: “the flap forming the top of the box”. Jan 24, 2020 at 5:09

1 Answer 1


People refer to a side or wall of the box, the top and the bottom.

They might be more specific by talking about the longer or shorter side/wall.

The bits at the top and the bottom that tuck in to seal the box are called the flaps.

https://www.google.com/search?client=firefox-b-d&q=cardboard+box+flaps https://www.themanufacturer.com/articles/how-a-cardboard-box-is-made/

  • Thanks for your answer. Is only the type of the top of the box shown in the post called the flaps? Could any other types of the top of a box be called the flaps?
    – zghqh
    Jan 24, 2020 at 6:29
  • The flaps are the parts at the top and bottom that fold in to seal the box. Jan 24, 2020 at 14:12
  • Thank you so much! Would you please take a look at this related post ?
    – zghqh
    Jan 24, 2020 at 20:40

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