The thong posts are far too long and stick out of bottom of sandal. I got these for my son who is 8. The buds fit in the ear great and do not shake loose easily as long as you use the correct silicone tip that fits best for you. Sidewise, they are snug, but I have not had them long and Im sure they will stretch, as slippers tend to. I just purchased this headset for my son who plays Xbox, he loves it ! Just dont try to charge them with regular batteries that are not designed for re-charging. These are quite good, though it’s currently the only closed-back headphone option. I also like things to be more sturdy, like cast aluminum but. the soles dont curve as authentic Birkenstocks do, the print on the footbed isnt indented, the list is extensive! Maybe every third day or so.