How to resize embroidery designs without ruining them

You can resize most embroidery designs, but only a little unless you have the editable file. Software makers Wilcom and OESD advise keeping changes to a stitch file (PES, DST, JEF and similar) to roughly 10 to 20 percent, because the stitches are scaled but not rebuilt for the new size. For bigger changes, resize the original editable design in software that recalculates stitches, or have the design re-digitized, then stitch a test before the real project.

Resizing an embroidery design is not like resizing a photo. A design is a list of stitches, and making it bigger or smaller changes how those stitches sit next to each other. A small change usually works. A big change on a stitch file often causes gaps, thick patches or puckered fabric.

Wilcom, OESD, Embrilliance, Hatch, Embroidery Library and Brother are named below because they publish clear advice. This site is not affiliated with any of them.

Why resizing a design can go wrong

A finished design is a long list of needle points, jumps, trims and color stops. When software scales it, every point moves, so stitches get longer or shorter and the rows of a fill move apart or closer together.

Wilcom says embroidery designs are not infinitely scalable, and that stitch count grows faster than size. In its examples, a letter B went from 251 stitches at 0.4 in (10 mm) to 2,670 stitches at 2 in (50 mm). A 0.8 × 0.12 in (20 × 3 mm) satin shape needed about 2.4 times as many stitches at double the size, and a 0.4 in (10 mm) square of fill stitch needed about 2.9 times as many when doubled to 0.8 in (20 mm). Wilcom also says that at larger sizes a satin column can become too wide for a single stitch, which causes gaps and uneven shading.

So a design only looks right at a new size if the stitches are rebuilt for that size, not just stretched.

Stitch files vs editable design files

Which file you have decides how much you can resize.

File type	What it holds	How well it resizes
Machine stitch file (PES, DST, JEF, EXP, VP3, XXX)	Stitch points and stops	Small changes only
Editable design file (Wilcom EMB, Bernina ART)	Shapes, stitch types, densities, colors	Can be rescaled and re-edited in the maker’s software

Wilcom says machine files hold only stitch data and machine stops, so they cannot be fully edited and scaling them is limited. Its native EMB file is object based and keeps the shapes, colors and stitch settings. Lettering can only be edited in EMB, not in a machine format.

EduTechWiki notes that most PES files hold stitches only, even though the format has room for editable design data. Our EMB format page explains the editable file, and our file conversion guide shows how to export the right format for your machine. If a seller offers an editable file or several sizes of the same design, take that over resizing a PES.

The 10 to 20 percent rule

Two makers give a number you can plan around.

Wilcom says scaling a machine file by more than about 10 percent lowers stitch quality.
OESD recommends 20 percent up or down as the limit for sizing a design. It adds that EXP and DST files hold only basic stitch information, without special stitches, and do not adjust the stitch count when a design is resized.

The two figures differ a little, so treat 10 percent as the comfortable range and 20 percent as the ceiling. Stitch a test on scrap fabric before a real project.

The table shows why even small changes matter. It is simple arithmetic, not a maker’s figure: when you scale both width and height, the area changes by the square of the scale. If the stitch count stays the same, density changes the opposite way.

Resize	Area	Density if stitch count stays fixed
80%	64% of original	About 56% denser
90%	81% of original	About 23% denser
110%	121% of original	About 17% less dense
120%	144% of original	About 31% less dense
150%	225% of original	About 56% less dense

A 20 percent enlargement spreads the same stitches over almost half again as much area. That is why fills start to show fabric.

Stitch count and density when you resize

Density is how many stitches sit in a given area. OESD notes that denser designs need sturdier fabric and more stabilizer to avoid puckering, and that overly dense designs can cause stitching problems and stiffen the finished piece. Our stitch density page explains the term.

Software handles density in one of two ways.

Keep the stitch count. The stitches move apart or together. An enlarged design is less dense and a reduced one is denser. This is the simple method and the reason stitch files only tolerate small changes.
Recalculate the stitches. The software adds or removes stitches so the density stays close to the digitizer’s intent. Embrilliance says its Essentials program resizes designs from 50% to 250% this way, and offers settings such as Gap Reduction, which helps close gaps between adjacent areas when you enlarge a design, and stitch length filters that avoid overly long or crammed stitches. Hatch lists resizing and recoloring existing designs among its Organizer tools, which it says every level of its software includes.

Recalculating helps, but it is not the same as re-digitizing. A design with tiny details can still lose them when it is shrunk a long way.

Expect the stitch count to change too. A bigger design usually means more stitches, a longer run time and more thread. Our stitch count estimator gives a planning figure before you commit.

Resizing on the embroidery machine

Many machines let you resize on the screen without a computer. Brother’s PE800 manual lists these size controls:

Enlarge or shrink the pattern proportionately.
Stretch or compact it horizontally or vertically.
Return it to its original size.

It also says some patterns and characters can be enlarged more than others, and some can be enlarged further if you rotate them 90 degrees. The machine keeps the pattern inside the embroidery area of the selected frame. On the PE800 that means a 5 × 7 in (130 × 180 mm) frame at most, and its message tells you to reduce the pattern or pick a different one if it is too large. See the Brother PE800 page for the field size.

Brother’s online manual for a wireless touchscreen sewing and embroidery machine goes further. It offers two resizing methods. One keeps thread density constant and recalculates the stitch count automatically, which allows a wider range of enlarging or reducing than normal resizing, and it lets you adjust density afterward. The other keeps the stitch count fixed, so enlarged patterns get less dense and reduced ones denser. For that second method the manual warns that embroidery quality limits how far a pattern can be resized. If a key is grayed out, that function is not available for the selected pattern.

The PE800 manual’s density control works only on some alphabet character and frame patterns, in 5 percent steps from 80 to 120 percent. Neither manual gives one percentage limit for resizing, so treat on-machine resizing of an ordinary stitch file as a small-change tool unless your manual says otherwise. After resizing, use the machine’s pattern position check to see where the design sits in the frame before you stitch.

How to resize a design step by step

Find the best file. Look for the editable file, or a version of the same design sold in the size you need.
Decide the target size. Measure the placement and check your hoop and stitch field. Our will-it-fit tool compares a design size with a machine’s field.
Keep the original. Save the resized design under a new name so you can always go back.
Resize proportionally. Lock the aspect ratio unless you want to stretch the design on purpose. Stretching one direction changes stitch length and density unevenly.
Use software that recalculates stitches. Our embroidery software guide compares what each program can do.
Check the stitch count and preview. A changed stitch count usually means the software recalculated the stitches. An unchanged count suggests it only scaled them.
Stitch a test. Use fabric and stabilizer like the real project. If a problem shows up after you edit a design, OESD suggests stitching the original design alone on scrap fabric similar to your project fabric, to find out whether the problem lies in the design or in the editing.

When to re-digitize instead

Resizing has limits. Think about re-digitizing, or buying a new size of the design, when:

You need to change the size by much more than 20 percent.
You only have a stitch file and the resized test shows gaps, gaping satin or crowded stitches.
The design has lettering or tiny detail that must stay readable at the new size.
You want to use the same artwork at very different sizes, such as a left-chest logo and a jacket back.

Re-digitizing rebuilds the shapes with stitch types, density and compensation chosen for the new size. It costs money or time, but it is the most reliable fix when you need a large change. Our digitizing guide explains what a digitizer actually does.

If you are troubleshooting a design that suddenly misbehaves, Embroidery Library advises against resizing or editing it at all while you work out the cause. It also suggests sending a fresh download straight to the machine without opening it in software.

Frequently asked questions

How much can I resize an embroidery design?

For a machine stitch file such as PES or DST, stay within about 10 to 20 percent. Wilcom says scaling a machine file by more than about 10 percent lowers stitch quality, and OESD's limit is 20 percent up or down. An editable design file in software that recalculates stitches can go further.

Can I resize a PES or DST file?

Yes, a little. Both are stitch files, so the software moves and scales the stitches but has no shapes to rebuild. OESD notes that DST and EXP files do not recalculate stitch counts when resized, so keep the change small and stitch a test.

Does resizing change the stitch count?

It can. If the software recalculates the stitches, an enlarged design gets more stitches and a reduced one gets fewer, so density stays about the same. If it keeps the stitch count fixed, an enlarged design becomes less dense and a reduced one becomes denser.

Can I resize a design on my embroidery machine?

Most machines with an editing screen let you enlarge or reduce a pattern, but only within the frame and only so far. Brother's PE800 manual says some patterns can be enlarged more than others, and a newer Brother manual says embroidery quality limits how far a pattern can change. Neither gives one percentage, so check your own manual.

Why does my design look bad after I resized it?

Common causes are gaps in fills and wide satin columns after enlarging, and stitches packed too tightly after shrinking. Stitch the original file for comparison and, if the original is fine, resize again by a smaller amount or from the editable file.