Basic Sewing Notions- This includes thread, pins, a seam ripper, iron, and scissors
Fabric- One of my favorite things to buy. This will vary based on what you make.
Measuring tape- As I mentioned above, this is a must-have. Accurate measurements are the key to great fitting clothes.
Drafting Rulers- I like to use clear Dritz rulers. The clear ones are light-weight and allow you to see the lines underneath your paper when altering store-bought patterns.
Eraser- A good eraser is like a good seam ripper, you'll need it more than you like to admit. I use a Pink Pearl just like I did way back in elementary-college.
Pen or Marker - I like creating dark bold lines for my final changes.