Just for fun: Apple leaker Digital Chat Station posted this on Weibo about the upcoming Apple foldable. English translation shown here.
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If we assume (as is likely) the phone folds in half, and that the outer display covers an entire side, then we can easily calculate the folded and unfolded screen dimensions, and thus the aspect ratios, since that gives us two equations and two unknowns.
Let:
a = folded screen width; 2 a = unfolded screen width; b = height
Then:
a^2 + b^2 = 5.49"^2
(2a)^2 + b^2 = 7.74"^2
Giving:
a = 3.15"; 2a = 6.30"; b = 4.50"
This means the crease will run along the short length rather than the long length. I.e., it will unfold like a Z Flip instead of a Z Fold. This gives an unfolded aspect ratio of 6.30/4.50 = 1.4:1, and a folded aspect ratio that's nearly the same: 4.50/3.15 = 1.43:1.
I suspect this was deliberate (assuming, of course the leaker's info. and my assumptions are correct)
, and will indeed be unique if all other foldable phones have significantly different aspect ratios when folded vs. unfolded (which I suspect is the case, though I've not checked comprehensively).
A-series paper does the same thing: All sizes are designed so that, if you cut it in half, it retains its sqrt(2):1 aspect ratio. That may be where Apple got the idea (again, if this leak is legit).
Using the bezel width of the iPhone 16 (2.275 mm =0.09"), we can estimate its folded size by adding 0.18" to each screen dimension, giving:
4.7" x 3.3"
That should be nicely pocketable, since it's close to the size of a typical man's bifold wallet (4.5" x 3.5"). Though I'd personally prefer if it were closer to the Z Flip in size. And those with small hands might find the folded size too wide to comfortably hold during calls.
To give some context, I've ordered these by area:
Samsung Z Flip 6: 3.35" x 2.83" = 9.5 in^2 (folded); 6.60 oz
Phone 13 Mini: 5.18" x 2.53" = 13.1 in^2; 4.97 oz
Rumored foldable iPhone: 4.7" x 3.3" = 15.5 in^2 (folded); est ≈ 8 oz
Samsung Z Fold 6: 6.04" x 2.68" = 16.2 in^2 (folded); 8.43 oz
iPhone 16e: 5.87" x 2.82" = 16.3 in^2; 5.88 oz
iPhone 16 Pro: 5.89" x 2.81" = 16.6 in^2; 7.03 oz
Oppo Find N5: 6.33" x 2.92" = 18.5 in^2 (folded); 8.08 oz
iPhone 16 Pro Max: 6.42" x 3.06" = 19.6 in^2; 7.99 oz
Alas, even if it is as pocketable as the Mini, it will still likely weigh ≈60% more.