幅 is built from the 巾 (cloth) and 畐 (full jar (in 福·副)) components.
It belongs to a phonetic family with 副 and 福 — they share the 畐 component and the reading フク.
A common word using 幅 is 幅 (はば), meaning “width, breadth”.
Don't confuse it with 福, 副, and 富.
