There's been many times where I've seen people use this tile grid. It's the one with the base pink background with deep purple bands around each section. Is this available online or will I have to make it myself?
Something like this?
Unfortunately, as Philipp mentioned, depending on your game it is unlikely that the grid would match your needs exactly. The one above is a 16px by 16px grid. For anything more specific, you'll probably have to make it yourself.
There is an answer on GraphicsDesign.stackexchange that shows how to make one using paint.net.