Style 'QTY' input size size + 'Quantity' title font size > PRODUCT DETAIL PAGES

Style 'QTY' input size size + 'Quantity' title font size > PRODUCT DETAIL PAGES

Can anyone help me with the css to make these circled parts 20px type size? or even better, to inherit the P2 size so if i change P2 size these will update, 'she assumes, with her terribly basic knowledge of css!'

You can use this code to Website Tools > Custom CSS

/* variant size */
.variant-option * {
    font-size: 20px !important;
}
div.product-quantity-input * {
    font-size: 20px !important;
}