Luxury Rectangle iPhone Cases That Turn Heads

Distinctive finishes and polished details, designed to make your phone part of the look.
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Drop-Tested to 10 Feet

MagSafe Compatible

Featured In WSJ

Trusted by 2.5M+ Customers

Best Sellers

COCOMII Real mother of pearl rectangle iPhone case in Natural, MagSafe
Natural
REAL MOTHER OF PEARL
$50
COCOMII Abalone shell rectangle iPhone case in Galaxy, MagSafe
Galaxy
ABALONE SHELL
$50
COCOMII Tortoiseshell rectangle iPhone case in Chestnut, MagSafe
Chestnut
TORTOISESHELL
from $40
COCOMII Crocodile leather rectangle iPhone case in Black, MagSafe
Black
CROCODILE LEATHER
$50

Explore by Design

Woman in a cream knit sweater holding a white COCOMII rectangle iPhone case in front of her face
Calm • Polished • Effortless

Minimal

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Red-haired woman holding a COCOMII rectangle iPhone case with a black and cream spotted pattern beside her face
Bold • Confident • Striking

Animal

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Woman in a white top holding an iridescent COCOMII rectangle iPhone case up in the sunlight
Radiant • Luminous • Captivating

Iridescent

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Woman in a red sweater holding a COCOMII rectangle iPhone case with a colorful checkered pattern
Chic • Elevated • Dynamic

Pattern

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About COCOMII

Design That Feels Like You

COCOMII makes luxury rectangle iPhone cases: a boxy, flat-edged silhouette with sharp right-angle corners, finished in genuine mother of pearl, alongside abalone, tortoiseshell and other premium finishes. Every case is MagSafe compatible, drop-tested to 10 feet, and ships free across the United States with 30-day returns.

★ 4.96/5 from 5,857 customer reviews

From the Style Edit

New to the shape? Start with the rectangle phone case guide. Then read what a tortoise shell phone case is made of, how to tell real mother of pearl from imitation, and whether a 17 Pro Max case fits the iPhone 18 Pro Max.

Read the Style Edit
Woman holding a COCOMII rectangle iPhone case with a black and cream spotted pattern in front of her mouth
Find the right fit for your iPhone and explore designs tailored to each model.

Choose Your Model

Shop iPhone 18/iPhone 17 Shop iPhone 16
Woman in a white dress holding a black COCOMII rectangle iPhone case against her shoulder
Tortoiseshell and croc-embossed finishes bring depth and character to our signature silhouette.

Rich & Textured

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Two women in cream tops each holding an iridescent COCOMII rectangle iPhone case
Real Mother of pearl and colour-shifting abalone finishes catch the light from every angle.

Luminous & Iridescent

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Woman in a cream top against a tan backdrop holding a COCOMII rectangle iPhone case with a brown and black spotted pattern
Discover the designs our customers love most, from signature favorites to standout new arrivals.

Customer Favorites

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Customer Reviews

4.96 ★ (5857)
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