Biggest of them all is the iPhone 11 Pro Max. This supersized smartphone has a huge 6.5-inch display with all the same tech as the iPhone Pro. 150.9 x 75.7 x 8.3 mm (11), 144 x 71.4 x 8.1 mm Buy Oterkin Case. 6. Mangix iPhone 13 Pro Max Magsafe friendly protective case. 6-mangix-iphone-13-pro-max-magsafe-friendly-protective-case. Check out this amazing iPhone 13 Pro Max Waterproof Magsafe Case from Mangix. A certified waterproof case from Mangix is the best you can avail of at an affordable cost. The Ultimateaddons tough case is designed to offer great protection while still giving you access to all of your camera functions. Complete Protection. IPX5 Waterproof. Dustproof. Absorbing silicone layer, reduces vibrations. Touch screen compatible. Clear camera protector panel. Removeable 3 prong connection. Legend. No. they are not. They are water resistant. NOT waterproof. Specifically they are rated to 6 meters of water resistance. That does NOT mean you can submerge them to 6 meters. You should NEVER EVER submerge a device that is rated at less than 50 meters water resistance. That goes for phones, watches, anything at all. Many consider the iPhone waterproof, but in fact the 11 is only water resistant up to 6.6ft/2 meters for up to 30 minutes, the Pro and Pro Max models up to 13ft/4 meters for up to 30 minutes without any additional coverings. 6P6ad.