Titleblock Tolerancing

[finvader]

I am new to Inventor and have created titleblocks with my company's logo on them. We use standard titleblock tolerancing based on dimension precision. I am working on a metric part and noticed that our old metric titleblocks have the tolerances called out in decimal inches (shows how much I've used them). Does anyone know what the standard or customary tolerance values are for x.x, x.xx, and x.xxx mm dimensions? I have had no luck finding an example of this anywhere!

Thanks!!