A2 I am sure this has a name, but I don't know what it is. I was sorting my dies today (shocker) and found this one, like was used on a card someone sent me.The left half of the ring is glued to the left gatefold front section. The right half of the circle is glued to the right side of the gatefold front.Cut the card 5 1/2" x 8 1/2". Score at 2 1/8" and 6 3/8" to create this card base.

 

Side panels are 1 7/8" x 5 1/4" and 1 5/8" x 5 1/8"