I am selling a navy blue swim cap. It is new, but has been tried on and stored for a long time. My son, a slender upper elementary school student with a small head, found it too tight, so I think it's a cap for toddlers to lower elementary school students. The head circumference is 20.5 cm when laid flat. The design is cute! I especially hope an Aries child will use it. Thank you for your consideration! #swimcap #swimming #pool #swimcap #playinginwater #nurseryschool #kindergarten #elementaryschool #navy #Aries #Aries