Assembly
All the gluing can be done with a tape gun but liquid glue works better. First put the center triangle in and be careful not to cover the fold lines. Then work outward until the card is together.
I made my own envelope for this card. I made the card a little smaller for you so that the envelope would fit on one mat. When I made the card I made it bigger and had to piece together the envelope. UGH! You card will be smaller but it will be square, so you will probably need to make an envelope. Measure the distance across the card when folded and make your envelope about a half inch bigger. Design Space has lots of envelopes to choose from.
And you’re Star Fold Card is done. Enjoy