Streaming live at 10am (PST)

Which artboard size should I design

Hello everyone !

Me and my team are confused about artboard sizes. As you know there are many different screen sizes. Generally people said that it should designed 1440 px. However Webflow basepoint is 1200 px. We are looking for common point actually. Because my team mate which is webflow designer told me that I should design 1920px 1024 px and mobile. To be honest I prefer design 1 desktop screen and mobile screen. Because it takes a little bit time when design different screens. Summarly I am asking which artboard size should I design for a desktop?

Here is my site Read-Only: LINK
(how to share your site Read-Only link)