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Home » Sewing » Sewing Techniques

BOX PLEATS - Easy How to Sew Box Pleats Tutorial

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Box pleats are one of the most common types of pleats and are created from two equal folds of fabric that meet in the middle. They can be used as a single peat or grouped together to form a continuous piece of pleated fabric. The pleats may lie side by side or be placed with larger gaps in between them to create endless different looks.

Box Pleats
Box Pleats

Box Pleats

What are Box Pleats

Box pleats is the name given to pleats that add fullness and shape to clothing, curtains and bags. They are created when equal amounts of fabric are folded to meet in the middle and can be inverted or standard types.

In clothing, they are often stitched at the top to hold them partially down and to create a flattering silhouette.

Types of Box Pleat

There are 2 main types of box pleats:

  1. Box Pleats - This general term is used where the pleat is folded externally. They are sometimes called standard box pleats.
  2. Inverted Box Pleats - These pleats are folded to the inside so are only visible with the movement of the garment. Inverted box pleats can be created from the same fabric folded or an insert of contrasting fabric. Really an inverted box pleat is just a reversed standard box pleat.

Box pleats vs Knife Pleats

The other main type of pleats are knife pleats. These pleats all face the same direction as opposed to box pleats which are formed by bringing the two edges of the fabric to meet in the middle.

how to sew pleats
Box Pleat vs Knife Pleats

When to Use Box Pleats

Box pleats are used to give shape and a sleek silhouette in garments. They are a way to let you move without restriction without adding too much volume to the body.

In home decor, they can be used as decorative highlights. Pleated curtains use variations of the simple box pleat.

Bagmaking makes use of box pleats to add depth and volume to bags. Without them it would be hard to fit many items inside as the pleats expand with your hand or more goodies.

Box pleats are often used in wool or heavy fabrics where it would be difficult to add volume by gathering. A pleat gives a more refined look to a wool skirt than gathering would.

Best Fabrics for Creating Box Pleats

Pleats are best created in natural fabrics which crease when pressed. Cotton, wool and linen are great choices as the pleats can be creased either at the top or along the whole length.

Polyester or man made fabrics should only be used where you just want the pleat held at the top and not pressed the whole way along its length. Synthetic fabrics will not hold a crease.

Thinner fabrics such as cotton can take smaller and densely spaced box pleats where as thicker fabrics like wool need wider and spaced pleats.

Related Articles

  • Types of Pleats
  • How to Sew Pleats
  • Knife Pleats

Box Pleats Video

Here is a short video on how to sew pleats including box pleats. Subscribe to the Treasurie YouTube channel for weekly sewing videos. 

Press play below >>How to Sew Pleats VIDEO

Box Pleats Video

Standard Box Pleats

Step One - Marking

Transfer the markings from the pattern you are using or create your own. Commercial patterns usually have pleats marked with dotted or dashed lines.

I have created a box pleat with a 2 inch (5cm) width and a 1 inch (2.5cm) depth. 

Transfer the box pleat markings from the pattern to the right side of the fabric.

How to Mark Box Pleats

For fabrics that can't be marked with chalk or removable pen, it is common to mark the pleat positions with a long basting running stitch in a contrast color. You may even want to use two colors of markings to represent the folded line and the ending line.

Since the markings need to be on the right side, do a check first to see if your marking method can be removed easily.

Accuracy in marking is essential as the lines must be parallel and evenly spaced to get good results. Pleats that go at a strange angle don't look good and won't allow clothing to hand well on your body.

Altering a Pattern

If you are creating your own pattern, mark the center pleat and then two lines to the sides which are half that width. My center is 2 inches (5cm) and each of the lines to the side is 1 inch (2.5cm) away. This means that you would need to add 2 inches (5cm) to a pattern that currently has no pleat.

Skirts with Box Pleats

If you are making a skirt with box pleats, measure your waist and then divide it by the number of box pleats you desire. For example, a 40 inch waist can be divided into 10 even pleats spaced around the skirt. Each pleat will need 3 times the fabric. So you will cut 40+(10x3)=70 inches of fabric.

Step Two - Fold Pleats

On the right side of the fabric, crease along the center (pink) lines and bring them over to the outside lines. As you can see, each side is folding out in the opposite direction.

How to Press Box Pleats

Press along the center lines to hold the pleat down.

If the fabric is delicate, such as wool or silk, use a pressing cloth to prevent marking or scorching as you press the pleats down.

On cotton, some spray water may help hold the pleats in place better.

For fabrics where the pleats will not stay closed easily, try some pins along the length of the pleat to hold them in place until you are ready to sew the next step in your pattern.

box pleat
Box Pleat Marking

Step Three - Baste

Baste across to top to hold the pleat in place. This can be done with a long machine stitch, by hand or just using pins.

how to sew a box pleat
Box Pleat Pressing

How to Sew an Inverted Box Pleat

The inverted box pleat is very similar except we are folding in the opposite direction. You could also create the pleat exactly the same way as the standard box pleat and then flip it over.

Step One - Marking

Alter your pattern in the same way as the standard box pleats in the instructions above.

Draw 3 parallel lines which are evenly spaced. I have drawn lines 2 inches (5cm) apart.

Step Two - Fold Pleats

On the right side, fold along the outside (pink) lines and bring the creased edge in to meet at the center line (blue). 

how to sew inverted pleats
Inverted Box Pleat Marking

Step Three - Baste

Press along the center lines to hold the pleat down.

Baste across to top to hold the pleat in place.

how to sew inverted pleats
Inverted Box Pleat Pressing

You can see here how it looks when it opens up.

how to sew inverted pleats
How to Sew Pleats - Inverted Box

Contrast Inverted Box Pleat

The great thing about inverted pleats is that you can use a contrast fabric to create a fun insert in a contrast fabric.

Look at the pleat from my Bella dress pattern. You can use this technique for one large box pleat or several inserts in a row. The brighter the contrast fabric the better.

My Bella dress pattern gives you the pleat sizes and a pattern to cut the insert with. But if you want to create your own box pleat pattern here are the cutting instructions

Determine the width of the underside of the pleat and then add a seam allowance to either side. I am going to make the underside of the please 4 inches (10cm) with ½ inch (12mm) seam allowances so will cut this strip 5 inches (12.5cm).

UNDERSIDE FORMULA = Width of pleat + (Seam Allowance x 2)

For the side pieces add to the pattern the finished underside width plus the seam allowance. So for our piece above, add to the pattern 4 inches (10cm) plus ½ inch (12mm) seam allowance which is 4 ½ inches (5.2cm). Now you may be thinking that this is too much since they meet in the middle but don't forget the pleat is folded back on itself. Cut one piece for either side.

TOP FORMULA (Cut one for either side) = Width of pleat + seam allowance

Use a straight stitch and your regular presser foot to stitch the center to the sides with right sides together.

Fold the sides to the center so they meet in the middle.

Baste across the top with a long machine stitch or using pins.

Now it is ready to join on to a waistband or anther item. You can even sew the top of the pleat closed for a partial exposure. Here is what is looks like when the pleat is spread apart slightly.

Box Pleat - In Conclusion

Now you know how to sew box pleats you can add them to all kinds of sewing projects for some extra fullness or even a pop of color.

Related Articles

  • Types of Pleats
  • How to Sew Pleats
  • Sewing Darts
  • Knife Pleats
  • Box Pleats

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