This gift card envelope is perfect for those last minute gifts!  The finished project is approximately 5-1/4" x 6-1/4" and comes with two inserts; one for two gift cards and the second for a single gift card.  The file is compatible with both the 12x12 and 8x12 mats.  

https://jamielanedesigns.blogspot.com/2017/12/gift-card-envelopes.html