Size is true fit 5 inches long, so I know they havent grown larger)--so I ordered these in a 5, but they were just a bit too short! I bought these in a size 4 for my 15-month-old granddaughter for a graduation. cannot walk on a hard floor. price-performance ratio is perfect! I removed the 3M PE foam from mine (see photos) and replaced it with Command foam sticky tape. It is entirely unpadded and tore my skin up after a few minutes of wear. Dont like how the earbuds just dangle with no magnetic hold and poor button control. Lo sto usando da poco tempo ma per il momento posso dire che mi soddisfa pienamente. You can double stack the small bottles like I did to save a little extra space and fit more.