J.S.
I responded to your message, but just want to reiterate that the Baby Trend Flex Loc is the shortest infant seat front to back.
If you're interested in a convertible, the First Years True Fit has a removeable head rest, making the tiniest, cutest little 'infant seat'. Then when baby gets older, you can install at 35 degrees instead of 45, and put the head rest on.
For Aruna: You CANNOT install the Chicco Keyfit (or any infant seat) front facing! Eeek! That is a rear facing infant seat only! The next step is a convertible, which should also be installed rear facing for another year or two.