Cut each cantaloupe wedge crosswise in half. If using large mozzarella ball, trim and cut into 6 cubes. Alternate 1 melon piece, 1 piece ruffled prosciutto, 1 mozzarella ball or cube, 1 more prosciutto piece, and 1 more melon piece on each skewer. (Can be prepared 2 hours ahead; cover and refrigerate. Bring to room temperature 15 minutes before serving.)