Hi there,
try this CSS:
.do-quantity-buttons form .quantity:not(.buttons-added):not(.hidden):after,
.do-quantity-buttons form .quantity:not(.buttons-added):not(.hidden):before,
.woocommerce form .quantity.buttons-added .minus,
.woocommerce form .quantity.buttons-added .plus,
.woocommerce form .quantity.buttons-added .qty {
max-width: 40px;
height: 40px;
}
If its not working – could you remove the coming soon so i can take a look at the issue ?