The sensory seeker's dream! Large bumps on one side, small bumps on the other for lots of varied sensory input. Each pendant measures about 2.5" long, just over ½" wide, and just under ½" thick - perfect for reaching the back molars. Available in 3 color-coded toughness levels. Adjustable breakaway cord. Personally made by ARK in Columbia, SC USA. ARK's Brick Stick® Textured Chew Necklace provides a safe, wearable, discreet, and cool solution for those who need to chew. Use this "chewelry" as an oral fidget (or even hand fidget) to help calm, soothe, and self-regulate during times of stress, to better focus during homework and other activities, for sensory oral motor input, and/or as a safe alternative to chewing/biting on fingers, knuckles, shirts, pencils, etc. ARK's Brick Stick® comes in 3 color-coded toughness levels: Standard - This is the softest level, recommended for mild chewers (those who do not chew through anything). XT / Medium Firm - This is the middle level, which we call XT ("Xtra Tough"). It's firmer, but still fairly chewy, recommended for moderate chewers. XXT / Very Firm - This is the toughest level, which we call XXT ("Xtra Xtra Tough"). It still has some “chewability” to it, but it’s fairly rigid / pretty firm. No chew tool is indestructible, but this is usually the longest lasting level for avid chewers.