How to change the dynamic shipping top banner text size ?

I order to increase the bellow banner text size, please follow these steps :

1. From your Shopify dashboard, click Online store => Actions => Edit code
2. Open the file theme.css.liquid
3. Search the following CSS code

.shipping-bar {
text-align : center;
margin-left: 0px !important;
margin-right: 0px !important;
font-size : 13px;
.grid__item {
padding-left: 0px !important;
padding-right: 0px !important;
} 
.one-third {
@include media-query($small) {
width: 100%;
}
}
.one-half {
@include media-query($small) {
width: 100%;
}
}
}

The default shipping bar text font-size is 13px, you can change it to whatever you desire, for instance :

font-size : 15px;

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