Kumihimo (組み紐) is a Japanese formSquare Kumihimo loom
by Animedia of braid-making. Cords and ribbons are made by interlacing strands. Kumi himo is Japanese for "gathered threads".
This is a Square type so you can make flat kumihimo
No supports needed
you can scale up or down the kumihimo square
if you want you can cut and glue a foam board with silicon glue.

(Summary copied from Square Kumihimo loom by Animedia)