iPhone 18/iPhone 17 Rectangle Cases

iPhone 18/iPhone 17 Rectangle Cases

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    COCOMII fits iPhone 18 Pro Max/17 Pro Max and iPhone 18 Pro/17 Pro with our signature rectangle silhouette, built-in MagSafe, 10-foot drop protection and a run of eleven finishes.

    COCOMII Real mother of pearl rectangle iPhone case in Natural, MagSafe
    Natural
    REAL MOTHER OF PEARL
    $60
    COCOMII Real mother of pearl rectangle iPhone case in Pink, MagSafe
    Pink
    REAL MOTHER OF PEARL
    $60
    COCOMII Real mother of pearl rectangle iPhone case in Black, MagSafe
    Black
    REAL MOTHER OF PEARL
    $60
    COCOMII Real mother of pearl rectangle iPhone case in Turquoise, MagSafe
    Turquoise
    REAL MOTHER OF PEARL
    $60
    COCOMII Abalone shell rectangle iPhone case in Galaxy, MagSafe
    Galaxy
    ABALONE SHELL
    $50
    COCOMII Abalone shell rectangle iPhone case in Milky Way, MagSafe
    Milky Way
    ABALONE SHELL
    $50
    COCOMII Abalone shell rectangle iPhone case in Eclipse, MagSafe
    Eclipse
    ABALONE SHELL
    $50
    COCOMII Abalone shell rectangle iPhone case in Aurora, MagSafe
    Aurora
    ABALONE SHELL
    $50
    COCOMII Abalone shell rectangle iPhone case in Nebula, MagSafe
    Nebula
    ABALONE SHELL
    $50
    COCOMII Opal rectangle iPhone case in Pearlescent, MagSafe
    Pearlescent
    OPAL
    $50
    COCOMII Opal rectangle iPhone case in Hot Pink, MagSafe
    Hot Pink
    OPAL
    $50
    COCOMII Opal rectangle iPhone case in Iridescent, MagSafe
    Iridescent
    OPAL
    $50
    COCOMII Opal rectangle iPhone case in Pink, MagSafe
    Pink
    OPAL
    $50
    COCOMII Opal rectangle iPhone case in Aurora, MagSafe
    Aurora
    OPAL
    $50
    Sold Out
    COCOMII Tortoiseshell rectangle iPhone case in Chestnut, MagSafe
    Chestnut
    TORTOISESHELL
    from $40
    COCOMII Tortoiseshell rectangle iPhone case in Ivory, MagSafe
    Ivory
    TORTOISESHELL
    from $40
    COCOMII Tortoiseshell rectangle iPhone case in Amber, MagSafe
    Amber
    TORTOISESHELL
    from $40
    COCOMII Tortoiseshell rectangle iPhone case in Tangerine, MagSafe
    Tangerine
    TORTOISESHELL
    from $40
    COCOMII Tortoiseshell rectangle iPhone case in Mandarin, MagSafe
    Mandarin
    TORTOISESHELL
    from $40
    COCOMII Leopard rectangle iPhone case in Amber, MagSafe
    Amber
    LEOPARD
    from $40
    COCOMII Leopard rectangle iPhone case in Ivory, MagSafe
    Ivory
    LEOPARD
    from $40
    COCOMII Leopard rectangle iPhone case in Chestnut, MagSafe
    Chestnut
    LEOPARD
    from $40
    Sold Out
    COCOMII Leopard rectangle iPhone case in Botanical, MagSafe
    Botanical
    LEOPARD
    from $40
    COCOMII Leopard rectangle iPhone case in Crimson, MagSafe
    Crimson
    LEOPARD
    from $40
    COCOMII Leopard rectangle iPhone case in Princely Paisley, MagSafe
    Princely Paisley
    LEOPARD
    from $40
    COCOMII Leopard rectangle iPhone case in Safari Butterfly, MagSafe
    Safari Butterfly
    LEOPARD
    from $40
    COCOMII Leopard rectangle iPhone case in Wild Cherry, MagSafe
    Wild Cherry
    LEOPARD
    from $40
    COCOMII Leopard rectangle iPhone case in Leopard Pear, MagSafe
    Leopard Pear
    LEOPARD
    from $40
    COCOMII Clear rectangle iPhone case in Crystal Clear, MagSafe
    Crystal Clear
    CLEAR
    from $40
    COCOMII Crocodile leather rectangle iPhone case in Black, MagSafe
    Black
    CROCODILE LEATHER
    $50
    COCOMII Crocodile leather rectangle iPhone case in Ivory, MagSafe
    Ivory
    CROCODILE LEATHER
    $50
    COCOMII Crocodile leather rectangle iPhone case in Rosewood Camouflage, MagSafe
    Rosewood Camouflage
    CROCODILE LEATHER
    $50
    COCOMII Checkered rectangle iPhone case in Neutral, MagSafe
    Neutral
    CHECKERED
    $50
    COCOMII Checkered rectangle iPhone case in Le Carré de Luxe, MagSafe
    Le Carré de Luxe
    CHECKERED
    $50
    COCOMII Checkered rectangle iPhone case in Monochrome, MagSafe
    Monochrome
    CHECKERED
    $50
    COCOMII Coastal rectangle iPhone case in Flamingo Paradise, MagSafe
    Flamingo Paradise
    COASTAL
    $50
    COCOMII Coastal rectangle iPhone case in Mariner's Treasure, MagSafe
    Mariner's Treasure
    COASTAL
    $50
    COCOMII Coastal rectangle iPhone case in Ocean Odyssey, MagSafe
    Ocean Odyssey
    COASTAL
    $50
    COCOMII Marble rectangle iPhone case in Molten, MagSafe
    Molten
    MARBLE
    $50
    COCOMII Zebra rectangle iPhone case in Bold Chroma, MagSafe
    Bold Chroma
    ZEBRA
    $50
    iPhone 18/iPhone 17

    About COCOMII iPhone 18/iPhone 17 Cases

    Sized for iPhone 18 Pro Max/17 Pro Max and iPhone 18 Pro/17 Pro, these COCOMII cases keep our signature flat-edge rectangle silhouette with defined corners and a slim profile. Eleven finishes fill the range: real mother of pearl, opalescent abalone and opal, tortoiseshell, leopard and zebra prints, a crocodile pattern on premium faux leather, checkered, coastal and marble designs, and crystal clear.

    MagSafe, Fit & Protection

    Every COCOMII case in this collection is made for the model you choose, with built-in MagSafe compatibility, reinforced rectangle corners and raised edges around the screen and camera. Cases are 10-foot drop-tested for everyday protection while keeping the structured flat-edge profile. Free US shipping is included on every order.

    Which iPhone models does this collection cover?

    This collection covers iPhone 18 Pro Max/17 Pro Max and iPhone 18 Pro/17 Pro. Choose your model in the selector on the product page, and check Settings, General, About if you are not sure which iPhone you have.

    Choose Your Finish

    Explore iPhone 18/iPhone 17 cases across COCOMII's four signature design families.

    Minimal Clear
    Animal TortoiseshellLeopardCrocodile LeatherZebra
    Iridescent Mother of PearlAbaloneOpal
    Pattern CheckeredCoastalMarble

    Complete the Look

    Pair your COCOMII case with a Phone Charm Wristlet or MagSafe Ring for a coordinated finish.

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