I do point out you can make exact size templates with freezer paper and iron them onto the fabric, cut out with seam allowance and sew along the edge of the paper. Also rulers are a latter day form of template, usefully multi-sized. Rotary cutters and rulers are generally our first choice but if you can make templates you can make anything.Ruth McDowall's work is a wonderful example of this.
|Boy's Nonsense block made for a Laurel|
|Block drafted on graph paper though|
normally the lines would be in pencil
|Individual shapes cut out roughly and stuck onto graph paper|
|Minus shape cut out, then drawn around with brass 1/4" wheel tp make plus|
seam allowance template with rounded corners.
|Normally the plus size is used to draw round on the fabric|
but you can if wished draw the sewing line using the
minus template and use the wheel to denote the cutting line.