1990 750 Slip on diameter

[skylinedrifter]

Hi, folks.

I am preparing to clean/ re-jet my carbs and thought I
It'd be a good time to throw some aftermarket slip-on pipes onto my 1990 VS750. What I cant find is the pipe diameter. Does anyone have the measurement, and are there any suggestions? I'm hoping for a roughly 30-ish inch long pipe. I can make most anything fit but some guidance would be most appreciated.

Thanks!