Here are comparison photos of both my girls at roughly the same age. I think Abigail was 9 months on the dot and Elsie was almost 10 months.
Elsie is smaller than Abigail (which is okay - Abigail is VERY tall) and isn't wearing the outfit that Abigail has on in her picture yet.
Elsie - September 5, 2010
Abigail - November 2, 2008