Sturdy clear flexible vinyl worm loop fasteners for slotted tags & cards Approx 1/8-inch round Flexible vinyl attachments Extra Long 9-inch length Durable luggage tag attachments Quantity of 100 clear luggage tag loops 9" long. Simple, yet sturdy clear flexible vinyl fastener for your slotted tag attachment. Thickness is approx 1/8". Common name for these identification attachments is worm loops. They are made of clear vinyl plastic.