This item is only the product itself, as I've taken it out of the box. It's unused because I'm exclusively breastfeeding. The nipple size is SS. It's unused and I won't be using it in the future, so please consider purchasing it if you're interested. Please note that the box is not included. Please refrain from purchasing if you are overly concerned about details. Instant purchase is welcome. Please comment if you have any questions. ☺