This property defines the Unicodes which have wide east asian width
Characters like ᄀ,ᄁ,ᄂ, etc. are listed under Wide East Asian Width.
121320 Characters are present in Wide East Asian Width starting with the Unicode point U+1100 that represents the character ᄀ.
Currently, as per latest version 15.0.0, Unicode supports 6 number of East Asian Width. Here are a few examples - Ambiguous,Full width,Half width, etc.