5 is euro size 38 which typically equals size 7 to 7. To describe the face. Email next day saying sent by UPS with tracking number but after several days, UPS has no record of that tracking number. I do not like running with these earbuds because the I found the collar bumping on my neck and collar bone rather annoying. Unboxing========================-Very neat,simple-Sadly it didnt come with an aux cord-The charging card cardboard on the side was kind of hard to get out until i forced it out and it torePairing/Controls/Range========================-Pairing bluetooth was very simple. It was adjustable and fit my 13 year old who is the size of a 9 year old and my 12 year old who loves a the size of a 16 year old. Perfect for our bathroom remodel. At this price the quality and the attention to detail to prevent frame damage should have been 10x I have what I thought was the exact same ram. After much testing, I finally discovered that the problem was caused by having another bluetooth audio device active on my phone at the same time.