what is the size of yui uehara's nipple?

https://allabout.co.jp/gm/gc/200249/

https://www.hmv.co.jp/artist_%E4%B8%8A%E5%8E%9F%E3%82%86%E3%81%84_000000000212106/item_PRECIOUS-SWEET-%E4%B8%8A%E5%8E%9F%E3%82%86%E3%81%84_213599