They're often around two feet (5)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
socks
(Other definitions for socks that I've seen before include "Hits - footwear" , "Short hosiery" , "Hits forcefully, garments" , "Hits forcefully (colloq.)" , "Disappointment at Xmas" .)