Set Include: 100* Elastic Cord Adjuster Condition: Brand New Material: Silicone Features: Adjustable Lanyard Buckle DIY Mask Elastic Cord Adjuster Mask Buckles Non Slip Stopper. Made of soft silicone, lightweight, durable and not easily break, you can use them for a long time. These cord adjuster will improve comfort for you when wearing a mask, reduce pressure and pain in the ears, for better protection. Easy to adjust the mask rope length to fit for various facial size, keep your mask in proper place, great for adults and children. Multi functional cord locks for drawstrings, round and flat elastic bands, sewing, homemade maskers, lanyard, sportwear, clothing and more. Size: Type A: Length 9mm/0.35", Width 6mm/0.24", Large hole 4mm/0.16", Small hole 2mm/0.08" Type B: Diameter 10mm/0.39", Large hole 4mm/0.16", Small hole 2mm/0.08" Friendly Tips: The size is measured by hands, please allow minor error of measurement. Photo color might be a little different from the actual product due to color display of different monitors.