5 narrow or the 8. I ordered a little bigger so she can wear them longer. Small, lightweight and portable. Somewhat large but thats okay! I?ve had them for a couple months and I wear them everyday and they still look and feel brand new. Will do a test when I link them up. - Battery improves to maybe 2 hrs if you use only one bud. Comfortable, the cream color goes with a lot of outfits. They look and fill just like my Ugg slippers, just cost a third of the Ugg price. this is also great - will not hesitate to buy this brand again.