Thank you for your information

Hi,

Unfortunately, directly modifying the button size and icon in Odoo online (Enterprise SaaS 17.2) is not possible. Odoo online runs on a hosted platform, and customizations like these require access to the server-side code, which isn't available in this version. 

Since direct customization isn't possible, consider submitting a feature request to Odoo. You can describe your desire to change the size and icon of specific buttons.