Does anyone know how to change the description text size in the list blocks?

Site URL: https://www.arirosenfield.com/

Hi I am trying to make the description text from p3 to p2 - anyone know how to do this?

Add to Design > Custom CSS

/* list item description */
.user-items-list-item-container[data-section-id="61d59eb8e4953946a45a6bc4"] .list-item-content__description p {
    font-size: 15px;
}