I have only ever used needles this size to do Broomstick Lace but you would only need one. Perhaps you would use several strands of yarn with this size or you will get something quite lacy if you use rug yarn.Rinni said:I bought two sets of large needles. One is a size 35/19mm and another a size 50/25mm. Where do you find yarn big enough for these needles? Do you know of any patterns that use these sizes?