Is this a new build or a reno?

Post a floor plan as the room is now.

It is adding a bathroom to a large bonus room to make it a proper master, so there isn't a floor plan. Just a plan for a 16x6.5 space to do whatever we want with.

Buying some graph paper and drawing different layouts to discuss with our build team was very helpful for me. I’d recommend doing that if you don’t have a floor plan. We also taped out spaces to get a sense of measurements.

Where are the windows? Entrance from the master? How does it relate to the rest of the floor? We need to see all that. No room lives in isolation in a home.

Re windows: We also need the width and the distance from the floor.

No room for a free standing tub for sure but a floor plan to scale is always a good idea. A freestanding tub needs a min of 12” all around it and more space is better so 6.5’ will not work .