ProTrail Li: sleep 2 small-ish adults?

I have one. It’s a palace for one. But two? No. You’d have to spoon in one position on one pad all night.

Big Sky has a 1.5 person tent.  Perhaps that would work.

My wife and I used to share a 40″ wide tent.  Worked fine.

I’d recommend the Rainbow 2p Li for cross-duty.

TT’s site includes at the end of the pictures a diagram showing the tent’s dimensions.  It shows the height to be 45″ at the front, and 24″ at the back, and note that the ridge between the two has a catenary cut (as many A-frames do) that is concave and therefore sinks.

The width of the floor is shown to be 42″ at the front, and 30″ at the rear; but the A-frame walls spread considerably wider to 70″ wide at front, and a bit wider at the rear, although that dimension is  not shown.   When designing a tent, I make thin cardboard scale models that show visually just how much space is under the canopy, and even put small dolls bought at the dollar store inside the models on top of small of stiff foam cut to the shape and thickness of the sleeping pad that will be used.  And that also provides a better visual picture.

Since this is an A-frame, the side walls slope from the catenary ridge to the outer dimensions.  So there is zero convexity, and considerable cancavity created by the catenary shape of the sloping ridge.

Since all A-Frame tents make me claustrophobic, I’m biased.  But TT’s own classification of this tent is for one person, and would suggest sticking with that.  Note that tent makers are prone to designing for the average person, not for all sizes of height and weight.  A good example for TT is their one person Notch Li with a floor area of 15.75 square feet, according to the dimension given on their site.  It is a popular tent, but that is a pretty small floor area compared to other one person stake supported tents I’ve seen.

Or maybe you could just order one and pitch it indoors if TT allows returns for that.  It might provide a good guide to how much size you need if you decide to buy a slightly larger tent.