# PCB Fabrication - Endless Noob Questions

#### BobW

##### Active Member
I've now designed my very first PC board, and am in the process of reviewing it. One thing that occurred to me is that I created a couple of custom pads and wasn't paying attention to whether the hole sizes were standard drill sizes. It's no problem to go back and change them, but my question, is: Is there a set of standard drill sizes that should be used?

Edit: Changed the title of the thread to reflect the inevitable divergence.

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#### ronsimpson

##### Well-Known Member
Where are you going to get the boards made? Most places have a list of drills they like.
Many places have "low cost boards" that must be, rectangle, 1 oz copper, ...…. and these 10 drill sizes. (for the low cost boards they will change your drills to the next bigger standard size, if you allow them to)
Bottom line; to the board house's website and see what they do for the best price.

#### BobW

##### Active Member
Actually, I don't know where I'm going to get them made yet. I'm open to suggestions. This would be for a non-commercial product, and I'd be looking for the lowest cost. The board, in its current state is single sided, dimensions are 2.25" x 3.25" (55mm x 85mm). In another thread, I'd mentioned that learning to use PCB software was one of my New Year's resolutions, and coincidentally, someone had contacted me to see if I'd ever designed a PCB for one of my projects. So, that was the circuit that I chose as my first PCB design project. So, at this point, I have a tentative design, and that's as far as I've got.

#### BobW

##### Active Member
I may give https://jlcpcb.com/ a try. It has good reviews on this forum:
I don't see anything about drill sizes on their site though. Maybe someone who's dealt with them can comment?

#### Visitor

##### Active Member
JLCPCB is good. Elecrow is another source I have used many times with excellent results.

#### BobW

##### Active Member
I assume non-mirrored means that all layers line up when viewed together?