Juvenile unisex life jacket

Almost brand new. He grew out of it so fast. It's blue, it's the brand is onyx. It can be Tony Hawk swim trunks for boys size 8-10. No tags but he grew so fast he wore them 2 times. So they are pretty much new as can be. There is netting on the inside of for a girl or a boy, and it just says youth juvenile doesn't really give a specific size so I wouldn't go any bigger than a child, probably by like size, ten would be the biggest