B asic Black 8 1/2" x 5 1/2" scored @ 4 1/4" Basic White 2 5 1/4" x 4" (inside and front) DSP 5 1/4" x 4" cut 1 3/4" in the middle https://youtu.be/tvMTG9nHgOw https://www.becreativewithkathy.com/post/dsp-open-flap-card