60cm length clear ruler with holes for pattern making project. This ruler has been sandwich printed between two pieces of plastic so that the numbers do not rub off. A transparent ruler allows you to see your project under the ruler for accurate positioning and marking. It is a perfect tool for assisting the user to increase or decrease the size of a pattern.
To enlarge patterns on grids, draw a grid to match scale given with pattern.
Draw the same line in squares as corresponding squares in pattern.
Line up any grid line on ruler to pattern line to create parallel lines.
Use cross lines of grid to create perpendicular lines.
Anchor ruler with thumb tack in center hole marked O.
Determine diameter of circle.
Divide that number in half and place pencil in corresponding hole.
Draw circle by rotating ruler like a compass.
Draw a base line.
Place center hole O on base line and secure with thumb tack.
Determine finished width of scallop and divide that number in half.
Place pencil in corresponding hole and draw scallops.