Features:

The sports running armband is a product that fits under 6 inches phone,the storage space is large enough to fit into 6"screen cell-phone(up to 6-inch).It's a bit tight for bigger cell-phone though it's made of elastic material,we advise you not to put in your cell phone with a phone case and wired headphone.The supplier told us that the oversized mobile phone could expose outside a part of it if you want to listen to music through headphones, as shown in the picture.(at this point if you have a bluetooth headset, it won't be a problem,your phone can also be completely wrapped in it)

Machine washable
Easy to fit on your arm
Keep your phone case on
Easy access earphone ports
Comfortable and lightweight
Easy to carry keys/cash/cards/earphone/pen and more

Compatible Phone Models:(up to 6-inch)

iPhone X, 8 plus, 8, 7 plus, 7, SE, 6s plus, 6s, 6 plus, 6, 5S, 5C, 5, 4S
Samsung Galaxy S9/S8/S7/S8 Plus/S7 Edge,S6/S6 Edge/S5,Note 5/Note4, J3,J7/J7 Prime 2
Huawei Mate 9/Mate 8/P10/P9/Honor 7x/6C Pro/Mate 10 Lite
Moto G4/Moto Z/Z Play/Z Force
LG G6/LG G5/LG V30/LG X Power
HTC U11/One M8/One M9/One X

Note:

Suitable for most arms,in order to fit your arms better and don't need to readjust or worry about slipping during physical activity,please measure your circumference of bicep to find out which size is best for you.

Armband Perimeter:
Small: 24 cm / 9.45 inches,
Medium: 26 cm / 10.24 inches,
Large: 27 cm / 10.63 inches

Arm size
Small: 18-25 cm / 7.10"-9.84",
Medium: 25-30 cm / 9.84"-11.8",
Large: 30-37 cm / 11.8"-14.6".

We recommend that if you are between sizes to choose larger size for a comfortable and fashion fit.