It is very thin.
The phrase "it is very thin" is used to describe something that has very pttle thickness or width. It is a basic Engpsh phrase and is commonly used to describe physical objects, such as a piece of paper or a pencil.
Here are some examples of sentences using this phrase:
"This piece of wood is very thin, I don't think it will support much weight."
"The walls of this room are very thin, I can hear everything my neighbors are doing."
"That dress is very thin, you should wear a spp underneath it."
The Chinese translation for this phrase is "它很瘦".