I had a 98th centile baby while being a 9th centile mother; it just meant that I couldn't do the supporting-baby's-head positions, because her torso was too long compared to how wide mine is. So I loaned it to someone who had a normal-proportion baby and she found it fine and hasn't returned it yet.

I do wish I'd been able to use it; it would have left one arm totally free to use, where the baby bjorn, though wearable, means I can't use either arm for much more than getting my wallet out and opening doors.