This is a natural sisal soap bag, which is rough enough to clean and exfoliate your skin, suitable for producing foam and lathering soap. 
For drying the soap quickly to make it last longer, you could hang your soap with the bag after use.
The Soap bag is around 14 x 9.4cm/ 5.5 x 3.7 inch in height and width, the size to hold most soaps.