Mobile header breakpoint

Hi! What is the breakpoint for the mobile menu (the screen width in pixels when the menu becomes a hamburger menu) and how can I change it? For the desktop, I have the logo to the left, an HTML widget in the middle, and the primary menu to the right. On mobile, this becomes logo to the left and the hamburger menu (with the primary menu as a drop-down menu) to the right. Not sure if this is relevant for changing the breakpoint… Thanks!