One size fits all. FEATURES: Lightweight, Breathable, Elastic, Durable, Moisture Wicking FUNCTION: Sunscreen, Dust-proof, Wind-proof MULTIFUNCTION: They can use as a Neck Gaiter, Face Bandana, Headband, Head wrap, Face Scarf, Balaclava, Face Mask Cover, Beanie, Bandeau, Sweatband, Headwear, ect IDEAL for SPORT OUTDOOR: Fishing, Running, Hunting, Hiking, Riding, Cycling, Motorcycle, Walking ,Workout, Military,ect. SERIES: Camouflage Pattern, Paisley Pattern, Solid Pattern, Flag Pattern, Joker Pattern, Skull Pattern, Galaxy Pattern, Bright Pattern, Black Pattern, Gray Pattern,Blue Pattern, ect. How do I know which pattern I'm ordering? We believe when you click on any of NECK GAITER it shows what is in each group of the 12pcs, 9pcs or 6pcs. They all have a group name when you move of them. For example, I ordered 6-Gray.