My phone with case is 6.5" x 3.5" x 0.5" and my bicep arm is about 9.75". I bought one size smaller. This headband fits my phone very well (the flip cover doesn't close all the way but I leave it open anyway), the fabric is soft, stretchy and comfortable, doesn't get wet or sweaty, the seams don't irritate. or things like zippers, velcro or buttons and it also stays on the arm. I mainly use it for running and skateboarding.
Sennheiser HD 206 Closed-Back Over Ear Headphones - Discontinued Model
195 Review
F FORITO 2-Pack Anti Glare Screen Protectors For 2022 MacBook Air 13.6" With M2 Chip - Protect Your Device From Scratches And Fingerprints
33 Review
NinjaBatt High Performance Battery For Toshiba A665 And L755 Series - 6 Cells/4400MAh/48Wh
40 Review
Rechargeable 12V 3000MAh Lithium Battery Pack: Power Bank For LED Strip, CCTV Camera & More
43 Review