How to Get Pointy Points in Blocks with Triangles

What is a Scant 1/4" Seam Allowance

and how does it help you get Pointy Points?

The Scant ¼” Seam Allowance Solution & Point Trimmer

Sew Accurately:

Prep-Tool with 8-page
booklet & 1 Seam Guide

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Square up the super easy way,
cut & sew accurately:


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The Prep-Tool comes with one peel-and-stick, self-adhesive Seam Guide with removable, reusable adhesive. They are 1/32" thick making it easy to align and guide your fabric accuratly before it gets under your needle.

The Prep-Tool also includes an eight page instruction booklet that you can download to view or print.

Replacement 6-Packs of Seam Guides are available separately. Click here to get a pack.

So if I cut my pieces with an extra full ¼” seam allowance all around, why should I sew them together with slightly less than a full ¼”?

The reason is actually pretty simple.

It’s because the thread and fold in a seam have some width. To compensate for that, you sew slightly less than a full ¼” so your finished seams actually come out measuring a full ¼”.

Using the top row of this Ohio Star as an example, before sewing the rows together, the points should be a full ¼” from the raw edges.

Here’s why sewing a scant ¼” keeps your points nice and pointy.

Sewing a Full 1/4"

When you sew the rows together a Full ¼” from the raw edges, the stitch line will be right on the points of the triangles.

When you press the rows open, the points end up in the fold.

The same thing happens to the points on the outside when you add sashing or a border.

Sewing a Scant 1/4"

When you sew the rows together a Scant ¼” from the raw edges, the stitch line will be about 2-thread widths away from the points.

When you press the rows open, you’ll have nice, pointy points.

Same with the points on the outside when you add sashing or a border.

The Prep-Tool a Scant ¼” wide & makes it easy to
set a scant ¼” guide on your sewing machine.

The goal is to stick the Seam Guide in front of the presser foot of your sewing machine to help guide your fabric before it goes under the needle.

The Prep-Tool makes it easy to align the Seam Guide so it's a Scant ¼” to the right of the needle.

Guiding your fabric against the edge of the Seam Guide makes it much easier to sew consistently, accurate Scant ¼” seam allowances.

Butt the Prep-Tool up against the needle of your sewing machine on the side with the gold lip edges. Peel the paper off the Seam Guide and butt it up against the other side of the Prep-Tool in front of your presser foot.

Butt the gold lip edges of the Prep-Tool up to the edge of the fabric, and you should see the line of stitching right along its edge.

If it's inside the edge, you need to adjust the Seam Guide farther away from the needle.

If it's outside the edge, you need to adjust the Seam Guide closer to the needle.

The Prep-Tool takes the guesswork out of marking precise seam lines.

Patterns often tell you to stop a ¼” from the edge of the fabric. What they really mean is stop right at the seam line, which is a scant ¼”. That’s the secret to sharp mitered binding corners and precise set in seams.

Mark precise mitered binding corners

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Take the guesswork out of
Set-in Seams

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Accurately pre-trim triangle points:

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