I made a really amazing tutu for my husband's niece two day ago (everyone was very underwhelmed.....depressing! They aren't much for the frilly stuff
) and used the up and down method and did the slipknots. After I was finished, I lined the waistband with satin ribbon. Made it much prettier and I assume less itchy. But I agree with the pp.....if you want it really full, you should do the up and down method. Oh, and I used 100 yards of tulle for the 4T size.