Solution:'black small bag' should be replaced with " small black bag". The order of adjectives in English is
- opinion,
- size,
- age,
- shape,
- color,
- origin,
- material,
- and purpose.
In the given sentence, 'black' is the adjective of color so it should follow the adjective of size 'small'.
Hence, 'black small bag' should be replaced with " small black bag".