Finding a good design craft materials is always a tricky matter for all craft designers.. at least until the invention of the Japanese Washi Tape. These decorated tapes are made of the Japanese Washi paper, and feature many interesting patterns that are suitable for all sort of designers. Some of the Washi Tape are available in a set with complimentary patterns and colors. I have gotten my Washi Tape Set online, which costs only less than $20 for 18 rolls of tapes.
TLDR: Washi Tape is a godsend for all craft designers. Get one of the best set here.
Japanese Washi Tape 2018