GoKawiilVideo compares folding iPhone Duo's dimensions against iPhone 18 Pro Max
An Instagram video from @thetechchap places the rumored iPhone Duo side by side with iPhone 18 Pro Max, using Apple's listed technical specs. Unfolded, the Duo measures 6.48 inches wide and 4.64 inches tall, closely matching the Pro Max's 6.43-inch height, while folded it shrinks to 3.31 by 4.64 inches.