Those are very traditional, and honestly wont give off an even light on your face. whats your decorating style, the mirrors look more modern to me, so i would find appropriate sconces for that style. The purpose of sconces along side the mirror is to give lighting towards your face, not direct light down towards the counter (not a pro, just my opinion lol)

Those fixture will have plenty of light, throw in the right LED bulb, and you are fine. Most of the time in 2nd baths you dont need to light up outer space lol.

If the electrical boxes to which the sconces will be attached are at the heights shown in your mockups, you cannot use long fixtures like the first suggested by @M Riz.

MRiz not the OP but could you tell me where that first sconce is from?

It was on a Pinterest board :( sorry

Thank you for all the input!
RL Relocation, as the sconces are glass, I agree that they will provide plenty of even light. I also agree that Bath 1 mirror and sconce may not be the best match, and am continuing to shop, so any other suggestions are welcome.
M Riz, the first photo of the long, narrow fixture will definitely not work for the style of my house, maybe something similar to the 2nd photo, thank you.
Since the house is mid-construction now, I don’t have photos, but will post the architect’s rendering of the exterior and photos that show the general design style of the house … if it’s ever completed …
Thank you again for your suggestions!

Photos not posting!

OK there’s one, but I can’t post the other one, frustrating!

And finally got the other one!

Have the electrician wait to put in the boxes until you have the dimensions of the sconces you end up picking, I know its just a board but do not put the boxes too high.

ok I just realized we are talking guest baths, so Im a little less concerned about applying makeup etc. I would also imagine you have recessed lighting? What is the wall length for the brown mirror so we know how much space we can use from edge of mirror to end of wall.

https://www.homedepot.com/p/Troy-Lighting-Brixton-1-Light-Gunmetal-15-in-H-Wall-Sconce-with-Clear-Glass-B6201/304952652

This could be amazing in a guest bath.

or what about capiz shell