Shape-morphing robots have shown benefits in industrial grasping. We propose form-flexible grippers for adaptive grasping. The design is based on the hybrid jamming and suction mechanism, which deforms to handle objects that vary significantly in size from the aperture, including both larger and smaller parts. Compared with traditional grippers, the gripper achieves self-closing to form an airtight seal. Under a vacuum, a wide range of grasping is realized through the passive morphing mechanism at the interface that harmonizes pressure and flow rate. This hybrid gripper showcases the capability to securely grasp an egg, as small as 54.5% of its aperture, while achieving a maximum load-to-mass ratio of 94.3.