The Normal sim comes with a micro sim and normal sim together
You can order new sim here- http://giffgaff.com/orders/mgm
How do i request for a normal sim card and not a micro sim for the current number im using.?
You can get adapters for them - I've seen them in Maplin for a few quid.
Alternatively, use your Spread Giffgaff page to order a new SIM, then use SIM Swap to transfer your service across.
More on SIM Swap --> http://is.gd/ggsimswap
Do you still have the card that you got with the sim as this would be the standard sim that you pushed the micro sim out of, if not you can get blanks from any phone shop.
If neither of those options are open to you then order a new sim and do a simswap see here:
Hope I've been able to help.
Welcome to giffgaff.