For Apple WatchSeries 3 42mm. For Apple WatchSeries 3 38mm. We will fully test the product to ensure thatall functions are working well before sending it out. If you can't wait pls add WhatsApp : ➕8️⃣6️⃣ 1️⃣7️⃣7️⃣ 6️⃣9️⃣8️⃣7️⃣ 2️⃣5️⃣4️⃣8️⃣.