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It's about 40 centimeters, and it's not good if it's wide, and it's not so good if it's narrow.
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350-400 is more suitable.
If you want to suspend the ceiling, the use of polymer composite ceiling or aluminum gusset ceiling, will cause the width of the edge strip to have a significant size, it is recommended to use gypsum board and other shapes to decorate the ceiling, can avoid the obvious situation that one side is large and one side is small.
Solution: Suppose x of these floor tiles are needed, 2 dm = m, x = 20 >>>More
Solution: Suppose you need to lay x such floor tiles, 2 dm = m, x = 20 >>>More
The width can be selected or 60 cm, depending on the height of the floor and the height of the hanging. If the height of the floor is about meters, it can be 40 cm wide and 8-12 cm hanging (it can be divided into two layers).
It's too long, so it's better to choose one.