Chicco Keyfit: how tall can your baby be?

Thanks for all the great advice on this site, I'm shopping for an infant seat for baby number two (we borrowed for #1 and he grew out of it at 6 months).

I'm curious about the Safeseat, to get the most mileage out of the days in the infant carrier, but I also like the lightweight feel of the keyfit, but I can't find the info on how tall baby can be--I just see the weight limit. Can any of you experienced parents tell me?

Also, many of the snugrides go to 29 inches now, correct? Maybe that is enough length for us!

Thanks so much,
Anna

Will 7-20-04
Baby #2 7-8-06