Metal cabinet dividers  - drawer cabinet dividers
 (blue cabinets)

8 drawer - Package of 12 dividers
Drawers are 11 x 5-1/2 x 2-1/4"

16 drawer - Package of 12 dividers
5-1/4 x 5-1/2 x 2-1/4"

24 drawer - Package of 24 dividers
3-1/8 x 5-1/2 x 2-1/4"

48 drawer - Package of 48 dividers
2-1/2 x 5-1/2 x 1-3/8"

60 drawer - Package of 20 dividers
2 x 5-/12 x 1-3/8"

Mix and match to fit your cabinets. 
The 30 drawer cabinet has drawers in the size of the 60 drawer, 16 drawer, and 8 drawer.