How can I reduce the width of my website page?

Hello, I would like to make the website width smaller.

Like this: in the red line

This is the website page: https://tiendacontraentrega.myshopify.com/products/rizador-automatico-de-cabello?variant=43060705788124

Thanks on advance for your help!

Hi @jtorres ,

  1. In your Admin page, go to Online store > Themes
  2. Choose the theme you want to edit then click Actions > Edit code.
  3. Open the theme.css under the Asset folder.
  4. Add the code below.
@media only screen and (min-width: 750px) {
.page-width.fullwidth {
    max-width: 70% !important;
}
}