The length of your natural does not determine the length of your weave. I seriously doubt that if women had i don't know 24 inches of natural hair that they would still do a full sew in. The length is not whats important it's how well you can "blend" the two. I purposely cut my hair short (going natural) and then did a 14" sew in. Everyone including the people I came out and told that it was a weave were impressed with how REAL my hair looked and my hair was much shorter than the weave....