Measurements are not quite what they appear to be; use care.  I was replacing an old medicine cabinet that was 16 x 26.   This is  26 inches long, but the box/medicine cabinet is much shorter (by 5 or 6 inches).  If you look at the diagram it shows the "box" behind the mirror is shorter.  That should be reflected in the measurements.  I had to use a different cabinet in my hall bathroom so my contractor didn't have to frame up to make this one fit. We are going to install it in a 1/2 bath instead and cut a hole for it so I will still use it.  I liked the simplicity of the design with some beveling which adds elegance.  Wish it would have worked but a more detailed website description would have helped on this one. (The other one I used was also bought on Wayfair - different brand - but that size was accurate to description so it worked).