Dont size up as they will stretch out too much and then be too big. While being charged may not work as a playback device, only as an analog output via additional 2. But when the velcro started to wear out to the point where Id have to re-bend down and push the flaps to together about 2 to 3 three times when walking the dog, I decided that enough was enough. Affordable and worth every cent. Playing music I hear a slight hiss. They run small as well. // THE GOOD STUFF //? Genuine Samsung product? Comes with SD adapter card? Close to rated speeds when tested// THE NOT SO GOOD STUFF //? Nothing found so far! I attempted to pay again, carefully examining my card and entering the information correctly. This speaker has good bass and treble. Not even XL for a woman.