I agree Phil, I think your right. Though Phicen tpe is firmer than that used in full size dolls, it's very resilliant and durable.
Scrappy, that got me curious so I just had to do the math.
So, my phicen weighs 0.7 lbs. and is 11.5" tall. with a scale factor of 1:6 she would stand 5'-9" tall, and she'd weigh just over 151 lbs.
That's a pretty heavy doll, and taller than most, with most dolls being closer to 5 feet 2, or so.
So, if she was scaled up to a doll height of 5'-2" tall, the scale factor would then be 1:5.39 and she'd weigh just under 110 lbs.
Some popular TPE dolls are in the 140 cm height range, which translates to 4'-7" tall.
So scaling my phicen to that size doll, the scale factor would then be 1:4.22 and she'd weigh just under 53 lbs.
And I believe that the WM 140 wights about 60 lbs...so I'd say that's pretty close!!