The size is small enough to easily fit in your pocket, purse, or keychain, but big enough for adult hands (kids love them too!). Think Link ™ Fidget Toys are comfortable to use and glide smoothly. They make great gifts and stocking stuffers! AUTOMATIC 20% OFF WHEN YOU BUY 2 OR MORE! (applied at checkout) Buying multiples in different colors? The easiest way to do that is to select your first color combo and "add to cart". Etsy will then bring you to view your cart. Just click "back" on your browser and then add your second color combo. Repeat until you have added all your colors to your cart. The discount will still apply automatically. (Sorry that it's difficult. Etsy has no way to change it) Purpose: The goal of starting this business was to have the sales of Think Links support donating these to those working with people with ADHD, autism, and anxiety, as well as places like schools, mental health clinics, rehab centers, and special needs classes. Because of the support all of you have given, we have been able to accomplish this and will continue to do so. We have even worked with The Longest Day Organization/Alzheimer's Association! So thank you so much! MY PERSONAL STORY: In 2011, I was diagnosed with attention deficit hyperactivity disorder ( ADHD ). This brought great relief when looking back at all the difficulties I had growing up that continued into adulthood. This also drove me to learn as much as I could about the “disorder”. One of those difficulties I still have today and will have for the rest of my life is fidgeting. A continuous barrage of toe-tapping, leg bouncing, cheek biting, pencil twirling, and nail picking. I pushed myself to frustration when trying to stop because, after a few seconds, I would forget that I was trying to stop and unconsciously start up again. So I wanted a fidget that would be discrete, quiet, and easy to carry around. So I started making Think Links! As someone with ADHD, I love how these fidget tools help me stay calm and focused. DISCLAIMER: I am sharing my personal experience and not making any medical claims. Think Links are not intended to diagnose, treat, cure, or prevent any medical condition. This product is not a substitute for professional medical advice. Always consult with a healthcare professional for medical concerns. The organizations we donate these to do not imply endorsement or treatment of any specific conditions. Construction: -1”(25mm) nickel-plated silver steel round-edged rings -Re-purposed bike chain link and spacers -Latex-free silicone o-ring bead spacers PLEASE NOTE: These are handmade because I enjoy making them and hopefully this helps someone as much as it helped me. Since these are handmade with the links and spacers being from re-purposed parts, each toy will be slightly different with the specific parts used and imperfections in the metal. The chain links might vary in color from those seen in the photos. SWALLOWING RISK: MADE OF SMALL PARTS. NOT INTENDED FOR CHILDREN OR WHERE THERE IS ANY CHANCE OF SWALLOWING.