Reply To: Checkout Field size

Hello,

Please add this code to the Theme Settings > Custom CSS > Global:

body.woocommerce-checkout input[type=text], 
body.woocommerce-checkout input[type=email], 
body.woocommerce-checkout input[type=password],
body.woocommerce-checkout input[type=search], 
body.woocommerce-checkout input[type=number], 
body.woocommerce-checkout input[type=url], 
body.woocommerce-checkout input[type=tel], 
body.woocommerce-checkout input[type=date], 
body.woocommerce-checkout select, 
body.woocommerce-checkout textarea {
    padding: 0 15px;
    max-width: 100%;
    width: 100%;
    height: 42px;
    border: 2px solid rgba(129,129,129,.2);
    border-radius: 0;
    background-color: transparent;
    box-shadow: none;
    vertical-align: middle;
    font-size: 14px;
    transition: border-color .5s ease;
}

Please change the padding and height to increase the field, remove the lines you do not change.

Best Regards