I use the biggest needles I can find with a point. All sizes depending on if you use embroider thread to tie or yarn. My group uses the crochet thread #9 and up that coms on a roll in a ball. Easy to use and goes a long way. If you look you can find packages of large needles like 5 to a pack. I made a little needle holder out of folded felt to keep them separate so I could find them to tie. Have fun