This Picnic Basket Card is sized to fit an A7 envelope.  It is approximately 5" tall and 6-1/2" wide.  The white mat (where you would add text) is approximately 4-1/4" x 4-1/4".  The red tab pulls up to reveal the invitation information (or you could add a greeting and/or gift card!).  Then you push the piece back down to form the lid for the picnic basket!  This file is compatible with both the 8x12 and 12x12 mats.  You can find more information and additional images on my blog:  https://jamielanedesigns.blogspot.com/2018/01/picnic-basket-card.html