Make Accurate HSTs Any Size
No Fractions. No Trimming.
(Rulers Not Included)

Cut the squares diagonally in half.
The exact amount of seam allowance
will be automatically added.

Half Square Triangle Addition
offers the precision of a die-cutter
and the flexibility to make
HSTs any size you want.

Made of unbreakable polycarbonate
Left-handed Friendly

Rulers work for straight cuts
like squares and rectangles.

To make half square tangles,
you need to cut squares
diagonally in half.

• So, you add 7/8" to compensate,
  which is almost 1/32" too much.

That's why quilters make HSTs
a little bigger, and then trims them down
to match with squares in the same block.

The Half Square Triangle Addition
lets you add the precise amount
of seam allowance, 0.854",
right on the edge of your ruler.

So, you can use a whole number
to make HSTs any size.

offers the precision of a die-cutter
and the flexibility to make
HSTs any size you want.

Your triangle squares will come out the finished size you want with a precise ¼” seam allowance automatically included all around.