1mm waxed cotton cord. Diameter may vary from 0.8-1.3mm. 250-yard (approximately 229-meter) spools. A great vegan alternative to leather cord: Wears similar to leather cord, but is not an animal product. Durable – can be worn while swimming or showering without deteriorating. Requires no special care. Easy to knot. This size spool is being discontinued by the manufacturer and replaced with a new size of spool.