Today I saw a photo of my friend's daughter, whom I saw in person more than a year ago. She looks to have grown about a foot since then.
Would it have been grammatically correct of me to say, "She's a foot taller from when I last saw her"?
How about "She's a foot taller than when I last saw her"? This seems less accurate since height ("taller") and time ("when") aren't comparable.
How about using both: "She's a foot taller than from when I last saw her"? This means she is taller than she was at the time I last saw her.
Stylistically, I prefer the first one--"taller from when I last saw her"--but is it grammatically correct?