A few cents to solve your permutation problem.

Imagine the need to get another sim card for a monthly subscription of S$10.70 monthly?

why not just use this?

Item will be sent out in random color (black/white/gold)        

Package includes:

• 1 x Nano SIM card adapter
• 1 x Micro SIM card adapter
• 1 x Standard SIM card adapter
• 1 x SIM card adapter pin