Hi Shalini,
I think that you have actually allocated lot of leaves towards the Casual Leave quota. What we follow is 4 Sick Leaves, 6 Casual Leaves and 12 Earned Leaves. The earned leaves calculation starts upon the probation getting over. Apart from this, we give 10 holidays a year.
However, the number of leaves allocated depends upon your firm's existing policies as well.
Regards,
Sajal