Newb looking for water saucers

[Gee]

I purchase 10 gallon grow bags for my for grow but did not think through that the pot would be on my concrete porch. I’d like to get plastic saucers to capture the excess water but am finding saucers too small. I think the grow bag width is 16”. Any links would be helpful. My porch isn’t liking me right now

 

[Carcass]

Water heater pans work well,they're about 9 bucks each at Ace Hardware-not sure where you are,but any hardware store should carry them-nifty little fitting on the side,too-if you don't need it,just get a pvc plug for it.