Welcome to our store!1. Size Details: The sports armband measures 15 x 12.5 cm; please measure your biceps circumference (untouched) to ensure a good fit; suitable arm circumference is 27-33 cm/10.7-13 inches.2. Elastic and Comfortable: The phone holder armband is made of elastic material, which is lightweight, comfortable, quick-drying, absorbent, and elastic.3. Easy to Wear: It is easy to wear on your hand, and you can easily insert your mobile phone, so you won't feel its existence during exercise, giving you a good experience.4. Multi-function Pocket: This mobile phone armband has a side pocket, which is convenient for you to carry small items with you, such as keys, key cards, or other necessary small items.5. Non-slip Reflective Design: The inside of the universal mobile phone arm bag is designed with non-slip glue, which will not come off even if you move a lot, suitable for travel, daily sports, and hiking; the reflective design makes you clearly visible at night to ensure your safety.Name: Arm BagSize: LWeight: about 30g/pieceMaterial: Milk SilkPacking: Transparent zipperFunction: Can hold small items such as mobile phones, bank cards, change, etc. Elastic and breathable.Packing list:1*Arm BagPackage weight: about 100g.Satisfaction guaranteed: Customers are our top priority. If you find any problems with the product, please contact the seller immediately. We strive to provide satisfactory customer service.