Why is it important to sew Scant 1/4" Seam Allowances?

A Scant 1/4" is slightly less than a full 1/4" and
it helps you get pointy points in blocks like these:

So if I cut my pieces with a 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 Super Easy Seam Guide Setter 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 Super Easy Seam Guide Setter 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.

 

Seam Guides are repositionable, removable and leave no sticky residue.

Super Easy
Seam Guide Setter

Sew accurate scant 1/4"

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Perfect4Pattern Set:

Square Up, Keep It Square
& Sew Accurate Scant 1/4"

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Cut & Sew
Accurately Combo:

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6-Pack Seam Guides

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The Prep-Tool is a Scant 1/4" wide:

Its lip edges make it easy to butt it up against the fabric's edge
and mark an accurate scant 1/4" seam line.

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.

Prep-Tool
with 8-Page Booklet & a Seam Guide

Finished-Size Quilting Set

Cut, Sew Accurately &
Make Accurate Blocks Any Size.
No Math!


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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