If you feel like you can't do any better try this. Buy a charm pack that you know each square is the same size. Buy a roll of Wonder Tape. It's double sided washable 1/4" tape. Take two fabric together on the edge and sew right along the tape line. Make a nine patch block. Now make a nine patch without the tape as a guide and see if there is any difference. I used Wonder Tape and basting glue by the mile and gallon and used only pre cuts until I learned to do it on my own.
