Case for iphone 13 pro max, for maximum protection, not tested, I recommend silicone.
Designing IPhone Case for 3D Printing - Instructables
Korean Aesthetic 3D Love Heart Lattice Mirror Phone Case For IPhone 13/12/11 Pro/XS Max/ X/R/7/8 Plus/SE Soft Silicone Back Cover From Mapleblazing, $4.93
Leaker Makes iPhone 13 CAD Files Available to Download - MacRumors
Apple iPhone 13 Pro Max 3D Model - 3DCADBrowser
IPhone 13, FREE 3D Smartphone models
Apple iPhone 13 Pro Max Graphite 3D model - TurboSquid 1790042
3D-Printed iPhone 15 Models Used to Test iPhone 14 Case Compatibility - MacRumors
iPhone 11 Pro Max by Apple - Dimensiva
iPhone 15 2023 by Apple - Dimensiva