Nike waist pack with reflective material, can store a plastic bottle. - Brand: Nike - Color: Black/Gray - Type: Waist pack - Size: Fits a plastic bottle - Features: Reflective material - Material: Nylon The size is about the size of a Calpis plastic bottle. Please see the third photo. I used it a few times to carry my phone, but it doesn't suit my running style, so I'm selling it. Thank you for looking.