This is fantastic tutorial with detailed drawings. It teaches how to correctly measure yourself to make perfect fitting leggins at home. It's a part of a series this website is doing about sewing knits. Drafting and Sewing Leggings // Stretch Yourself
[FABRIC + THREAD + NEEDLE CHART] Thread advisor, shows fabric type, thread to use, and needle to use. Site also has pdf file version. Good chart for hand & machine needles but only specifies one brand of thread--that of the advertiser.