Photos can be deceptive? Why are you asking?

The placement of doors, windows, closets, light switches, vents, etc will all affect the useful space. In addition, the height and width of the windows will change the useful space. Ask a more direct question and explain why you are asking so you will get the correct information.

Is this a master bedroom in a place you want help figuring out how best to move into? In other words, if these are the pre-existing dimensions, do post a floor plan (doors, windows) - this can be rough but preferably measured out

If this is something you want to build, I did live in a home with that dimension of the MR bedroom. But we'd still need to know where the entry access and the closet is located. In my case, there was no master bath. We need to know more about your situation.

Our master is 14’8” (plus 16” window seat) by 15’. Because our prior master was much larger (but really chopped up with doors), I was concerned that the new master would be too small, but it turned out to be the perfect size because it isn’t choppy. So you can visualize, here is the basic layout and a pictures from different angles.

I think ours is 14x16 (no dresser). I presume (or assume) that the OP is considering a plan with this size and is worried it will feel too small. But OP, I really don't want to make an a.... out of myself so give us the digs...

I have a 2nd home with a 13x13 Master with a king bed, dresser, 2 night stands, TV and 2 closet doors (separate doors). It works - but is small feeling.

The big questions that matter are - do you want a King bed and will you have a dresser (or a large walk-in closet). The mass of your bed matters a lot also. So do you have a bedroom set already?

So many questions....

Ours is 14x13 so smaller. We have a king sized bed, two night stands and a dresser. It’s not huge at all but works perfectly for us. We have a master ensuite and a walk in closet too