Is it possible to make custom page widht for example 1250, 1275 1225 etc. and not only 1200 or 1300?
@heartlessoff - try by adding custom value, looks like you can type value in it
You can go to online store, edit code of your theme.
search settings_schema.json, search page_width and then there is a field step, change it from 100 to 25.