Powder Room Mirrors That Will Instantly Elevate Your Space
The household sequence below is the one that kept the room usable while it was unfinished. Want a little help choosing powder room mirrors? I'm sharing the preferred mirrors and sizing pointers to help you pick the best one for your space!
Remodeling our powder room was way down on my things-we-need-to-do-to-our-new-house list! But… once we removed our old toilet and pedestal sink prior to our hardwood floors refinishing, it just made more sense to work on it now instead of putting the old stuff back in and then taking it out again six months down the road for a redo.
So I jumped into removing the floral wallpaper, installing bathroom shiplap, and adding a new toilet, vanity, accessories, and… a powder room mirror. Since I spent so much time searching for a mirror, I thought I'd do a quick round-up of the preferred powder room mirrors along with some mirror sizing pointers too! (post includes commissionable links; for more information, see my full disclosure statement {here})
To catch you up if you've missed it, this is what our powder room looked like when we first moved in:

and this is our powder room after we remodeled it:

Sources:Wallpaper | Shiplap (similar) | 2-Light sconce | Round rattan mirror | Vanity | Faucet (similar) | Woven soap pump | Towel ring (stainless) | Vanity baskets (large) | Toilet | Toilet paper holder | Bird art print (18 x 24) with White wood frame (similar)
I wanted a round powder room mirror for this space since there were already a lot of straight lines with the vanity, flooring, and shiplap. In my round mirror search, these were my favorites…
Round Powder Room Mirrors

Mirror Sources: 1. White rattan mirror | 2. Classic metal mirror with top hook | 3. Jute mirror | 4. Round mirror with leather strap (also see {this similar mirror}) | 5. Rope mirror | 7. Wood frame mirror | 8. Wood ball mirror
Classic Powder Room Mirrors
I also considered going with a mirror that's super simple and classic, especially since I chose a fairly busy wallpaper. Most of these come in several size and finish options:

Mirror Sources: 1. Curved edge rectangular mirror | 2. Classic round mirror | 3. Oval mirror | 4. Arched mirrored medicine cabinet | 5. Rounded rectangular mirror | 6. Pill shaped mirror | 7. Round pivot mirror
I have an entire post with other bathroom mirror approaches if you want to see more stylish options!
Sizing of Powder Room Mirrors
While there's no one “right” size for powder room mirrors, over the years The household has figured out what size I like best based on the size of the vanity the mirror is going over. For round mirrors, I prefer the mirror width to be at least 80% the width of a single-sink vanity but no larger than the full width of the vanity:

For petite vanities 24″ and under, err toward the larger end and chose a round mirror that's the full width of the vanity or close to it.
For rectangular mirrors, I prefer the mirror width to be at least 75% the width of a single-sink vanity but no wider than 2″ less than the width of the vanity:

Unlike with round mirrors, I don't like rectangular mirrors to be the same width of the vanity because the straight lines of the mirror lining up with the straight lines of the vanity looks too blocky to me.
It would help if those sizing pointers help if you're planning a powder room redo too! Looking for more bathroom redo work inspiration? Look at these posts:
My Kept Bathroom redo Approaches

Elsewhere in the house
BathroomsWould I Do It Again?: Marble Tile in a Bathroom
BathroomsIs It a Good Idea??: Wallpaper in Bathrooms
BathroomsOur Bathroom Redo Start and finish: The Big Reveal
BathroomsA Fabulous Wallpaper Source, An unfussy Tip for Elevating the Look of Your Bathroom, + 15 Way Day Pieces Worth Keeping
BathroomsWhat Actually Works (And What Doesn't): Mixing Metals in Your Bathroom
BathroomsOver The Toilet Storage Solutions
BathroomsEvery Selection for Our New Build: Timeless Bathroom Fixtures
BathroomsAll the Details: Our Bathroom Floating Shelves
BathroomsWays to Paint a Tile Floor: The Tools and Pointers that Work