The use of your watch will not be affected because this earphone case is ultra-thin and fully transparent. This earphone case can well protect your earphone from fall, shock, dust and scratch. It is constructed of TPU material. This earphone case is high-temperature resistant, indeformable and wear-resistant, which has long service time. There are two sizes for you to choose from. This earphone case is suitable for Apple Watch Series 8. Item Name: Protective Case Material: TPU Style: 38/40/41mm, 42/44/45mm Applicable Model: for Apple Watch Series 8 Features: Shock-proof, Wear-resistant, Anti-scratch Size Details: 38/40/41mm: L: 4.1cm/1.61", W: 4.1cm/1.61", H: 0.6cm/0.24"(Approx.) 42/44/45mm: L: 4.5cm/1.77", W: 4.5cm/1.77", H: 0.6cm/0.24"(Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Protective Case