How do I use the size over life particle module?

Sorry if this is really remedial, but I couldn’t find any sort of guide or figure this out myself. I have a beam particle effect that I am using as a bullet trail for a hit-scan weapon and I want it’s length to shrink while the endpoint remains fixed as time progresses. I also want it’s girth to increase as time progresses. Is the size over life module the correct way to go about this? If it is, what do I do? If not, then what should I use instead?