Please watch this video: INCREDIBLE TRICK,Watch how I get my NEAT and STANDING Beaded Bags //DIY IDEAS ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-EG-WgurcoiI.html
Is the same method as the video link below but you will weave 4 rolls instead of 2 rolls then you cross or join the sides with the 5th one Quick & Easy way to make a TRIANGLE beaded bag HANDLE / 5- minutes crafts. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-_ZcIaus-fcA.html
There is no measurement for the thread,you have to cut enough that you can handle to prevent it from tangling and it’s normal to run out of fishline during rows,so you just have to cut another one and continue with it 🥰