Here's the difference in size between the regular postcards and oversized postcards. I can't locate my punch at the moment but you can see the notches on the regular size. When you notch the larger size the headband fits on them perfectly without needing to crease it in the back
Here's the two ways to secure the headbands on the smaller cards.
The first has the notches and tape
The second has a hole punched in the middle of the card and then I clip the alligator clip through the hole to secure it
Wife to Rod and Momma to Tyreque, Ladaria, Raquel, Brayana, Destini, Jaleel, Makkiah, Taniyah and Cavelle along with my angel in heaven Angie and 85 foster kids who have left imprints on my heart All Ribboned Out
Remember Me Pillows to Remember your loved one whose far away