Active Hands gripping aids are designed by and for those who have poor hand or finger function and require a strong grip to hold items. Our gripping aids products are used by thousands of people worldwide to give independence in tasks requireing a strong hand grip. They are used by adults and children with many types of disabilities or other hand function problems including those with spinal injury (tetraplegics/quadraplegics), Cerebral Palsy, Multiple sclerosis, Stroke, nerve damage and many other injuries and illnesses affecting hand strength/control. Our products are used to grip items such as weights/gym equipment, pool/snooker cues, DIY/gardening tools, kayak/canoe paddles, nintendo wii remotes and much more. Our customers include numerous paralympians as well as casual sports/leisure/hobby users. Which size should I get? Dimension A: wrist circumference, Dimension B: wrist to top of middle finger. Small: A=5.3"-5.9", B=5.3"-6.9", Standard: A=5.7"-7.2", B=6.8"-8.3", Large: A=7.1"-8.7", B=7.7"-11". Items should arrive within 3-4 weeks.