Fitting the Pants Block - Initial Fitting

Fitting the pants block isn't as difficult as it may seem.  A good fit through the waist, hip, and crotch is critical, but it really isn't that hard to achieve.

Like many people, I had a hard time finding the pant fitting pattern in my size at the sewing center.  I could have ordered it from Amazon, but I know that many people don't have that option, so I decided to find an alternative and demonstrate the fit process on a different pant.

The Vogue fitting pattern is still my recommendation for a good pant block, but if you can't find it, it IS possible to create a block from a simple, pull-on pant pattern (NO styling details!!!)

The first step is to cut the pant in muslin.

A fitting pattern has a large seam allowance (usually 1" to 1 1/2").  This pant has the US standard 5/8" seam allowance.

But, since the pant is so oversized and I know that I will be taking it in rather than letting it out, I will cut it with no extra seam allowance.

Then, mark the vertical and horizontal grainlines.  Mark the seam allowance (you'll be stitching along this line), and any other marks that will assist in stitching the pants.

The small mark on the front crotch seam was not on the pattern.  I added this mark to indicate where to stop stitching the crotch curve.  Once the pant has been fitted, you'll need an opening (above the mark) to get it on and off.

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Pin It

There is a video demonstrating the fitting of this pant, at the bottom of this page.  PLEASE read the steps, below, and look at the photos before viewing the video.  The written instructions and photos explain things the video does not, and vice versa.  The photos and video work well together.  Thanks!

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Stitch the pant, then try it on. Pin the center front opening closed.

I've put it on a dress form to make the demonstration easier, but it's best to fit the pant on yourself, since you are the one who will be wearing any pants made from the block.

If you use a dress form (without legs), see the video for how to put the pants onto the form.

As you can see, these pants are WAY too large! But the grainlines are straight, and the crotch shape looks good (as good as it can look on a dress form) - the excess fabric is easy to deal with.

Cut a length of 1/4" elastic and tie it around the waist to hold the pants in place.  Make sure the front, back, and side seams are lines up properly on the body.

Then pinch out and pin the excess fabric at the sides.  Pull the fabric fairly smooth and taught across the seat and hips, and place the pin as close as possible to the body.

Also, make sure the you are pinching the same amount of fabric on the front and back of the seam (the seam should be right on the edge of the fold of excess fabric).

Pin It
Pin It


We don't really want to eliminate all the ease in the pant.  The first pin simply tells you how much excess fabric there is at the hip.

Now, place a second pin about 1/2" away from the first pin (1/2" farther from the body).  Remove the first pin - this adds about 2" total ease all around the seat/hip area. It's not a lot of ease, but it's enough for a fitting block. 

Pin the side seam, using the pin at the hip as a guide. 

For example, I pinned this pant in about 1 1/2" at the hip.  I continued the 1 1/2" pinch all the way down the leg to the hem.

NOTE: if you're taking in the outseam at the hem, you'll have to take in the inseam the same amount - AT THE HEM ONLY!  The inseam would then taper to 0" at the thigh or crotch seam.  Don't take it in through the crotch, as it will make the crotch too tight.

From the hip to the waist, CURVE the pin line to follow the shape of the hip. You will be shaping the side seam toward the body (in the photo - I should have pinned a bit MORE curve near the waist for better fit).

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Pin It

Pin the excess fabric at the side seam towards the back so it doesn't become a distraction when you look at the pant.

Now, go to the back seam. 

Because this is a pull-on pant with excess fabric at the waist, there isn't much shape at the center back crotch seam.  Pinch out the excess fabric at the waist, to the fullest part of the buttocks (like a dart - it will probably be about 1 1/4" to 1 1/2" pinched at the waist). You won't actually stitch a dart; in this case, you'll re-shape the back seam (more on that later).

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Once you have the center back seam pinned, there will still be a little extra fabric at the back waist.

Pinch out darts on each side of the center back seam, to the fullest part of the buttocks (the darts should be about 6" long).

You should, at this point, have a pant that fits nicely across the back waist and the seat/hip area.

You'll still have a little excess fabric at the front waist, too.

Do NOT pinch out fabric at the center front, as you did in the back.  The center front seam should be OK as is.

But you will pinch out darts on each side of the center front seam, as you did in the back.  These darts should not be as deep or as long as those in the back (the darts in the photo are actually a bit long - aim for about 4").

Then mark ALL of your pins before removing them. You are marking your new stitch lines, so it's important to mark the side seams (front and back side of the seam), as well as the center back seam and all darts.

Pin It

Once you've marked all of your pins, you can remove the pins and re-stitch the pants following your marked lines.  Cut off most of the excess seam allowance, and you'll be ready for a second/final fitting.

What's the Next Step?

  • Fitting the Pants - Final Fitting

Step-by-Step: Making and Fitting Your Block

Need More Help with Fitting Issues?

The examples on this site reflect MY fitting issues and how I resolved them.  YOUR body is likely very different. 

But, since this is a site about MAKING patterns and not specifically about fitting, I'm not going to address other fit issues here. And believe me, there are others who can address this issue better than me.

Any of the online classes and books listed below will help you achieve good fit. You can use the techniques on any pattern; but why make the same corrections over an over again?  Apply the principles to your block, and the fit corrections YOU need will be automatically built in to every pattern you make!

I can recommend any of the following classes or books to help you achieve good fit, no matter what your size or shape.  I have taken some of the classes and own or have used almost all of the books on this list, and have been pleased with how they address fit problems.

I am an affiliate of both Amazon and Craftsy, so I do receive a small commission from the sale of any of the books or classes when you use the links below.  You can also go directly to Craftsy or Amazon to order without generating a commission.

Online Sewing Class

Craftsy offers online sewing classes, including classes that specialize in fit. Two that I'd look into include Easy Fitting the Palmer/Pletsch Way: Shirts & Tops and Sew the Perfect Fit. They also have a fabulous class in altering patterns to fit plus sizes, called Plus-Size Pattern Fitting & Design.


Pattern Fitting With Confidence - Written by Nancy Zieman, host of the TV series "Sewing with Nancy". She provides a straightforward, down-to-earth approach to sewing and fitting. Very user-friendly.



The Complete Photo Guide to Perfect Fitting - I love this book!!! So wonderfully illustrated with photos, using commercial patterns to demonstrate the pattern alterations. It addresses almost any fit problem you might have. So easy to understand and follow!





Sewing for Plus Sizes: Creating Clothes that Fit and Flatter - A great book for Plus sizes! As a woman gets larger, it's not just the measurements that change - our overall proportions shift, too. This book addresses the different body types and proportions you commonly see in larger women. Truly helpful for larger women.



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