She's not that big! My youngest was rear facing until he was 3yrs old, 42" tall and 35lbs. Your daughter is not that big, so don't worry about a seat fitting her, just find a seat that has a higher harness weight and height. Avoid anything that only harnesses to 40lbs, and avoid the Cosco ALpha Omega 3-in-1.
What car seat is she in now? She's only a year old, she needs to remain rear facing. please google EXTENDED REAR FACING and JOELS JOURNEY.
The Safety 1st Complete air will easily rear face your daughter to age 3, and it will forward face to 50lbs, and its a very tall seat.
First Years TrueFit Premier will rear face to 35lbs, forward face to 65lbs. Its a nice tal lseat that my 5yr old still has plenty of growing room in (he's 46" tall and 45lbs). This is the seat I got for our new daughter, we are adopting her from Ukraine. SHe is 3 and will be rear facing in it.
Britax Roundabout 50 will rear face to 35lbs, forward face to 50lbs.
Sunshine Kids Radian XTSL will rear face to 45lbs, forward to 80lbs.
These are all appropriate seats for your daughter that will allow her to rear face as long as possible, keeping her 500 times safer in teh car, and in the harness forward facing beyond the bare minimum of 4yrs and 40lbs.
When rear facing the seat is outgrown when the child hits the weight limit or there is less than one inch of hard shell above the childs head. The harness should come from jsut at or below the shoulders, and the child is safest rear facing until they hit the rear facing weight limits of hte car seat. Feet touching the seat are NOT a problem and should never be a reason to turn a child forward facing. The AAP, NHTSA, Safekids, and even car seat manufacturers recommend children remain rear facing until the yare at least 2yrs and 30lbs, or until they max out the seat rear facing.
Please google extended rear facing and Joel's journey so you cna keep your little girl safest.
PS a few have mentioned the Britax Frontier... that cannot be used until a child is 2yrs old, regardless of size. Thats because, like everyone else, Britax wants you to keep your child rear facing until age 2 or longer.