Lay studs out on cardigan and make sure you like the look! Feel free to play around with them and make a pattern, or just scatter them!
Push the first stud through the material of your cardigan. Push nice and hard to make sure all prongs make it through.
Now fasten prongs with your nails, a plyer or just with your finger tips! Be careful...!
Here's a look at your new cardigan!!
Repeat all throughout the top half of your cardigan as shown.
Here's an "inside" look!