NYMO is the beading thread of choice for bead weaving and bead embroidery. It is twisted for strength and pre-waxed for ease of use. It can be knotted tightly and securely. 72yards long. Nymo nylon beading thread comes in 5 sizes, from thickest to thinnest, they are: F, D, B, O, OO. Size D thread is .30mm/.008inches in diameter and will accommodate a size 12 beading needle. D is the most commonly used size Sold individually.