TheSeries 4 is the first Apple Watch to make the leap to a 64-bit operating system, with a new dual-core S4 processor that Apple promises is twice as fast, hopefully making it feel a little AppleWatch Ultra 2 (GPS + Cellular) 49mm Titanium Case with Blue/Black Trail Loop - M/L - Titanium. Color: Titanium. Model: MRF63LL/A. SKU: 6560081. (318) $799.00. Shop for apple watch 44mm at Best Buy. Find low everyday prices YMHML3 Pack Screen Protector for Apple Watch 44mm SE Series 6 series 5 series 4, 3D Curved Edge Full Coverage Waterproof HD Clear Soft Film for iWatch 44mm The45mm Apple Watch is larger than last year's model replacing the 44mm versions on the Apple Watch Series 6. The new design allows the Apple Watch Series 7 to have the biggest screen ever in an Apple Watch, which means that the big screen is much more noticeable in the 45mm case size. 45mm Apple Watch Series 7 weight: 38.8.0 L4dEuI.