Square Rulers
Metal L-shaped square rulers for pattern-making, pattern drafting and drawing: 15×30, 25×50 and 40.5×61 cm, with a 90-degree angle. For drawing perpendicular lines, squaring the edge of the fabric before cutting and checking corners.
Products: 6
What is a square ruler
A square ruler is an L-shaped ruler: two marked arms that meet at a right angle of 90 degrees. In pattern making it drafts the framework: the center line, waistline, bust line and hip line, all perpendicular to one another. In English it is called an L-Square or Tailor's Square.
Uses in sewing and pattern making
Drafting the framework of a basic block pattern.
Squaring the fabric edge perpendicular to the selvage before cutting.
Marking the lengthwise grain line on the pattern.
Checking the corners of pockets, collars and lapels.
Measuring and drafting straight lines.
How to choose a size
15×30 cm: for details, corners and a home table.
25×50 cm: for basic blocks of shirts, skirts and dresses.
40.5×61 cm: for long lines, wide fabric and the cutting table. Also suitable for carpentry and home projects.
How to check that the angle is accurate
Place the ruler on a sheet of paper and draw a line along the arm. Flip the ruler over, align it with the same base line and draw again. If the two lines coincide, the angle is square.
Related guide: Pattern-making rulers: square, curve and cutting – what each ruler drafts
More in Rulers
For drafting curves, see Curve Rulers, and for cutting fabric with a rotary cutter, Cutting and Quilting Rulers. All types of rulers are in Rulers. For measuring the body before drafting, see Measuring Tapes; the rest of the tools are in Sewing Supplies and Sewing Notions. For wholesale orders for a school, studio or shop: phone 03-9444226 or WhatsApp 055-2473993.
Frequently asked questions
What is an L-square?
An L-shaped ruler with two arms that meet at a 90 degree angle. It is used for drawing perpendicular lines and checking right angles.
Why do you need an L-square for sewing?
To build the frame of a pattern, square the fabric edge before cutting, and check the corners of pockets and collars.
Which size of L-square suits pattern making?
25×50 cm suits most basic patterns. 15×30 cm is for details, and 40.5×61 cm is for wide fabric and long lines.
What are the L-squares made of?
Metal.
How do I check that an L-square is accurate?
Draw a line, flip the ruler over and draw again from the same base. If the lines coincide, the angle is square.
How do I square the edge of fabric with an L-square?
Place one arm along the fabric edge and draw along the other arm. Cut along the line.
What is an L-Square?
The English name for an L-shaped square ruler. It is also called a Tailor's Square, a tailor's ruler.
Is an L-square also suitable for carpentry?
Yes, especially the large 40.5×61 cm one, for marking and checking angles in wood, boards and cardboard.
What units are the rulers marked in?
In centimeters and millimeters.
Can I order a quantity for a school or studio?
Yes. For wholesale orders for a school, studio or shop: call 03-9444226 or WhatsApp 055-2473993.