Hi.
If that is hole size, it will be difficult to achieve. Even twice that tolerance would be tighter than is usually specified for ordinary FR4/copper laminated PCBs.
If that is tolerance on position of the edges, it is even further from practicality. Drills tend to wander off vertical as they go thru a stack of boards.
You should consult a few vendors on practical tolerances. For example:
You're welcome.