I bought a yard of each of these fabrics and six pillow forms.
After some serious ironing, the envelope pieces were created. My pillow forms are 16x16, so I used the following measurements for the pillows. Dimensions for other sized pillow can be found on the youtube tutorial.
Pillow form 16x16
(1) 17x17
(1) 17x12
(1)17x13
(1) 17x17
(1) 17x12
(1)17x13
The finished product: