Common PCBWay Drill Size Chart (CNC Machining)

I am finalizing a design for CNC machining through PCBway, but I noticed some of my holes are non-standard drill sizes.

I can adjust them to be closer to nominal drill sizes, but a chart of common drill sizes or drill #'s that PCBway is equipped with would help me select the most suitable size to adjust the holes in my item.

Example:

I have 6.780mm holes that I can just change to 6.8mm if that is a more common/nominal size that PCBway carries and can hold within their specified tolerance.

It probably doesn't matter, but I'd like to adjust it anyway.