Different hand anthropometry and load transfer use cases require specific handle forms for maximum usability with minimal contact pressure in the hand-handle interface. This work’s form-morphing handle adapts to these factors by varying stiffness of its granulate-filled, flexible shell aiming at the use context of walking aids. The 3 x 6 study compares the adaptive handle to a size-personalized and a use case-optimized handle for load transfer tasks. Contact pressure is compared via rmANOVA, showing significantly lower pressure for the adaptive handle. 3D-scan form analysis provides design suggestions for enhanced ergonomics in adaptive hand-handle interfaces of hand-held products and tools.