I just finished two rag quilts for a one year old and a newborn. My blocks started out 5" but with 1/2" seam they ended up 4". I put an X in each block anyway for security, and so they wouldn't look 'unfinished'. I've always heard that rag quilts have an X in each block. I love the way they turned out. Only have a pic of the first one because the second one hasn't been washed and frayed yet. I love rag quilts!!!