In the design of manageable packages for customers with hand function problems, we were faced with the problem of deciding which assessment tool to use. No studies have been done to show the relationship between performance-based and self-reported assessment of hand function to management of packaging. The purpose of the current study is to examine the relation between a self-reported hand function measure and performance-based measurements. The participants consisted of 40 adults who have impaired hand function. The Grip Ability Test (GAT) and Grippit test and self-reported assessment questioner were administrated. The findings of this study showed a slightly correlation between performance-based and self-reported assessment of hand function, therefore, further research is needed in this area. © 2011 Taylor & Francis Group.