Size: 3.1x3.1CMShipping Terms: 1. We ship within 48 hours after payment is received. 2. Combine shipping is made for multi purchase. 3. We offer free shipping with economic air mail (with track number). Please contact us if you need express delivery. 4.Delivery time is 20-25 days.Please consider the time before you buy.Problem Solving: 1. We always double check the quality before we ship. However, please understand that there might be some problem occasionally. 2. If there is quality problem, we will provide 100% refund or free exchange. 3.Return cost will be paid by SELLER. Feel confident to buy.response: 1. Your response is our greatest treasure. We appreciate if you can leave us 5 star response. 2. Please DO contact us before leaving neutral or negative responses. We promise that we will give you a satisfying solution.