I turned the sketch side ways
To do this card I reduced the butterfly pattern to 75%. I then fussy cut around the butterflies, hand drew a line from one body to the next and backed it with black paper.
Pattern: Stitching cards Free butterfly
Thread: All brands and colour codes unknown
Pentel fine liner in black
card stock: 160 in white
Paper: 80gsm in black
Flowers: Olfa punch