The medium Thumb Gapper™ is .20 inches thick, and designed for average sized hands.
M Thumb Gapper®
Our goal is 100% customer satisfaction! Every Thumb Gapper™ is checked before it is mailed to a customer. However, should something get damaged during the shipping process, contact us and we will replace your Thumb Gapper™. We also offer a size guarantee. If the Thumb Gapper™ you purchased is the wrong size, let us know by emailing firstname.lastname@example.org.