Pietra Pants For Curves

Elastic waist pants are a dream! But…(butt)…you gotta be able to get them on first. These Pietra Pants from the Rome Collection by Closet Case Patterns have such a beautiful design. Most sewists will be able to follow their clear instructions and sew them up easily, slipping them on and calling it a day in no time. Pants without closures are a quick little dream to sew! However, with my waist-to-hip ratio, I wouldn’t be able to pull them up over my tushie, even with the elastic. I’m not complaining, and neither shall you! Check out how I graded sizes, added an invisible side zip, and included some nice finishing touches. Survey says: New favorite pantaloni!

pietra pants inari tee front view
Pietra Pants with Avocado dyed top
The Details
  • Pattern is the Pietra Pants by Closet Case Patterns view B, available sizes 0-20
  • I graded from a size 10 waist to size 18 hip (my measurements are 29/45″ waist/hip)
  • Modifications: lengthened size 10 rise by 1″, added invisible side zipper
  • Fabric is hemp blend from Chiang Mai, Thailand brought to the US by a dear friend
  • Finishings: French seams for front and crotch, bias bound facing seam, and overlocked inseam and side seams

A note about this blog post: It’s long and photo-heavy. If you’re looking for specifics, use these links to jump ahead to the section you need, or just get comfy and come along for the whole ride.

  1. Grading Sizes and Lengthening Rise
  2. French Seams
  3. Bias Bound Facing
  4. Invisible Side Zipper – Front Leg
  5. Invisible Side Zipper – Back Leg
  6. Finish Elastic Waistband
  7. Finished Photos!
pietra pants back view elastic waist
Rear view
Grading Sizes and Lengthening Rise

In the Pietra Pants pattern, Closet Case gives really great instructions on grading sizes because they tell you which pattern pieces to start with, and then by lining up the other pieces against the notches, you’re able to make sure all your pieces will fit together nicely. Pay attention to their instructions on which seams not to grade sizes as well.

I graded from a size 10 at the waist to a size 18 at the hip. This hip curve ruler was so useful to get a smooth line. I added 1″ to size 10 rise. You’ll see how I used medical tissue paper to cut and spread the pattern pieces apart. If you lengthen or shorten the rise, don’t forget to do it twice on the pocket piece so it mirrors itself when you fold it upward. That goes for the grading as well. It’s important to fold the pocket up, and fold the waist seam side of the pocket back down so the curves match. I did not make a full seat adjustment like I often do with other pants. See the photos and descriptions below. My grading lines are in pencil, and I only printed sizes 10 through 18 using the layers feature in the PDF.

Back leg grade from 10 at the waist (top of photo) to 18 at hip with 1″ added to the rise
Back leg graded from 18 at the hip down to 14 at the knee notch on both the side seam and inseam.
Pocket curve from the notch down matches the back leg curve I drew in the previous step. Folded the waist seam down at the notch and mirror the same curve.
Bottom edge of the pocket mirrors the top curve when folded up and matching notches. See the slight grading on the lower left.
Folded pocket piece on top of back leg piece, checking that the curves match. Then I used the pocket piece as a guide to trace the same curve on the front leg.
I did not grade the straight seam of the center front leg. I kept that as a size 10, which is my waist size. I started tracing a size 16 on that side, which you can see in pencil, but then I changed my mind so ignore that mark. The curved edge on the right is graded from a size 18 at the hip to a size 14 at the knee notch.
I ignored the lines of the interfacing piece, and just copied the pocket seam edge of the pocket. You could just cut a strip of interfacing and trim it accordingly before you apply it to the pocket.
French Seams

I’m embarrassed to admit this so imagine this in really small text because I do not endorse this message: I didn’t make a muslin/toile. I didn’t do a fit check. I just went for it with really precious fabric….using French seams.

Please don’t do that. It worked out in my favor, which is sending mixed messages. French seams give a wonderful clean finish, but they are a bitch to undo if the fit isn’t right. I used French seams on the pocket, front, and crotch seams. Also, I admit I was not in the mood to rethread my serger so I went forward with the French seams. I did end up caving and threading the serger for my side seams and inseams because I got my wits about me and realized I might want to check/change the fit, though I didn’t have to!

French seam porn; 9″ Prism LDH Scissors (made in Canada!)

There are great tutorials on how to do French seams out there, including in the Pietra Pattern instructions! The quick and dirty is to sew wrong sides together at 3/8″, trim down to almost nothing (1/8″), flip over and press right sides together carefully and really well, then sew right sides together at 1/4″. That works for a 5/8″ seam allowance because your two runs (3/8 + 1/4) = 5/8″, so any other seam allowances, you’ll have to adjust accordingly.

Bias Bound Facing

Further stubbornness in avoiding rethreading my serger: using bias tape on the lower edge of the front facing pieces. Laziness can indeed lead to more work. I love the finished result though. I also have these bias tape makers, but I didn’t use it here. There are lots of ways to do this, but here’s mine! Each of the following images in this section leave me more and more oddly satisfied, and I need a cigarette after the last one. Lol. JK, I don’t smoke, but you get what I mean.

Bias strip scraps sewn together and pressed open

I went back in my pile of scraps and managed to get two small strips cut somewhat on the bias. Maybe a 30 degree angle instead of the true bias at 45 degrees. Still works! I pieced the two pieces together at an angle and pressed seams open.

Pin right side of bias strip to the wrong side of the facing
Sew with 3/8″ (or less) seam allowance
I should have trimmed first (next photo), but it doesn’t really matter. Press bias tape away from the facing.
Trim the seam allowance
Press the other edge of the bias strip, wrong sides together, about 1/4″
Fold pressed edge of the bias strip over to the right side of the facing, covering the raw edge. Press and pin.
From the right side of the facing, stitch along the edge of the bias strip. Trim the sides off.
Admire it. Yeah baby.
Invisible Side Zipper – Front Leg

Closet Case mentions in their instructions that if you do grade several sizes larger in the hip, you may want to include an invisible side zipper. I fall into this category! They don’t include instructions for a side zipper, which is why I took careful notes and lots of pictures. So, I hope you find this useful! I know an invisible zipper isn’t the most challenging thing in the world, but this one was only my third invisible zip ever, I think? So I just bought a colorful pack of these and I think they’ll last me awhile, ha!

I had to take a step back and wrap my brain around it with the facing and the waistband, but I got it right on the first try! Feel welcome to copy my steps! Let me know if you would have done something differently, but I might not care because this turned out so well. Ha!

Ok, follow all of the instructions to assemble the front legs and front facing. Before you sew the facing to the front of the pants, follow along with the pictures below.

Press the zipper teeth away from the tape, and pin the zipper to the front left pant leg right sides together. The zipper teeth should fall right on the 5/8″ seam allowance line.
Stitch into place at 5/8″ and backstitch at the top and bottom of your zipper. My zip is really long, so I marked/clipped the end of my zipper and trimmed it later.
Sew the facing to the front pant as directed, over the zipper tape.
Grade, press and understitch facing as directed, stop and backstitch just before the zipper teeth.
Flip the right side of the facing against the right side of the front pant. Pin along the zipper into place.
Sew through all layers, close to 5/8″ seam allowance, just at the edge of the zipper teeth without catching them. In this photo, the zipper teeth are to the left of the stitch line. Flip and check the zipper pulls easily before clipping the corner.
Turn right side out. Press. Admire. Baste the non-zipper side as directed in the pattern.
Invisible Size Zipper – Back Leg

After the invisible zipper is sewn to the front leg in the previous steps, follow the instructions in the pattern to assemble the back legs. Once you are ready to sew the side seams, follow along with the photos below.

Once your back legs and waistband look like this (wrong side), you are ready for the invisible zipper on the back leg.
Close the zipper on the front leg and mark the top and bottom of your zipper on the exposed tape. Lay the bottom pant against the top pant right sides together matching notches, and mark or clip where the bottom of your zipper will be on the back leg.
Trim excess zipper tape at the bottom and backstitch over teeth below zipper pull (left of photo). Pin zipper tape to the back pant leg. The zipper teeth should run along the 5/8″ seam allowance stitch line. Note the notch mid waistband (upper right of photo) will be the top of the pant.
Sew the zipper to back leg, pull zipper closed to check your work. (Wrong side)
Check your work, ensure leg notches still line up.
At the center notch on the waistband edge (top of the waistband when wearing) clip zipper tape and pin away from waistband.
Fold the waistband over, right sides together and matching notches. Raw edge of seam allowance is still folded and pressed. You are about to sew along the faint horizontal fold line you see above.
Sew through all layers as close to 5/8″ seam allowance, stay just within the zipper teeth. Turn right side out and check your work before clipping the corner.
Looks good from the wrong side! (and it looks good from the right side too)
This is where I bit the bullet and rethreaded my serger. You can finish the raw edges how you like, but I flipped the facing away again and overlocked the entire side seam from the ankle to the top of the waist.
Sew the side seams and inseams as directed in the pattern. Stop at the bottom edge of the zipper and backstitch.
Finish Elastic Waistband

It should be fairly straight forward to finish the waistband and elastic of the back of the pants at this point. I just want to point out that in the instructions they say to leave a 4″ opening at one end to pull the elastic through. I did this on the zipper side. Once I pulled the elastic through, I could sew it to the seam allowance side of the zipper. That way you don’t interfere with the zipper teeth on the right side of the garment.

Pulled elastic through and sewed to seam allowance of the zipper tape edge. Finish waist band as directed!
Finished Photos!

We made it! Now for an excess amount of finished photos. I loved trying these with a couple of different tops. The cream waffle knit is the Taos Top by Threadbear and I think these textures and colors really work for me!

pietra pants front view
Taos Top, Pietra Pants, Sven Clog Sandals
pietra pants side view
pietra pants front view closeup
Deeper pockets because I lengthened the rise
pietra pants side view with invisible zipper
Invisible side zipper!
pietra pants front view
pietra pants back view elastic waist
pietra pants front view closeup

I also tried the pants on with my beloved avocado dyed Inari Tee by Named Clothing. If you want to read about how I dyed the upper portion of this handmade top using avocado pits, read about that here! I would never think to mix pink and peach like this but with the white in between I’m digging.

pietra pants front view
Pietra Pants, Avocado Dyed Inari Tee, team French Tuck
pietra pants back view with untucked shirt
Untucked back view
pietra pants front view
pietra pants back view
pietra pants front view closeup
Final Thoughts

This is a great pattern, beautiful design, and a fun sew! I’m so thankful I got the fit and the zipper modification right on the first try. I really hope you can find my process useful if you are also considering this pattern and grade larger in the hip. It might sound cheesy, but the quick and swift movement of pulling up pants over your hips should not make you pause, struggle, cry, or make you feel less than the queen you are. Make the pattern bow down to you! xo

16 thoughts on “Pietra Pants For Curves”

  1. That bias bound facing is a work of art -bestill my beating heart! I intend to steal that idea ihopeyoudon’tmind…

    Unfortunately I don’t need to insert that zip, because (as my husband lovingly says) I “have no a*s”. We always want what we don’t have. lol

    Thanks for all the details!

    1. Haha! Please steal away, and I am so happy it makes you happy. Skipping the zip will make these a super fast sew! Have fun!

  2. Chloe Montrose

    I love a comprehensive blog post, especially one this instructive. But what I REALLY love is that fabric. It is so beautiful, pairs wonderfully with this pattern, and so meaningful that a friend brought it over from Thailand for you. Thanks for a great read.

    1. Thank you so much, Chloe! Yes, I used to live in Thailand, but it was before I learned to sew. When my friend was coming over to MN for a visit, it was SO FUN to have her send pictures from fabric shops and ask me which I liked most. When she brought this one over last summer, I remember saying, “Oh I’ll have to save this one for something special!” xo

  3. Linda Dinnocenzo

    Beautiful fit, pants, photography, tutorial! Unlike you I have no hips although I wish I had more of a curve. My daughter though has a very big waist /hip differential and often cannot find pants that fit . I have not tried to make her pants but when I do I will need all the help I can get.

  4. Great looking pants and a lovely job with the zipper ! I’m half done with the Pietra shorts which are ending up a bit sloppy /big in the waist but need width in the hips/rear. So will bookmark your zipper instructions for future use. thanks.

  5. Thanks so much for your post! I have to grade from a size 6 waist to a size 10 hip. The side zipper is a really great idea – cuz I can’t pull these pants over my hips either. This is my first pair of pants – and it’s been a challenge!

  6. Mia, I’m just impressed by these beautiful photos. It is so delightful, combines magnificently with this example, thus important that my husband brought it from abroad. I wish I had to a greater extent a bend. My cousin, however, has an extremely huge abdomen differential and regularly can’t discover pants that fit. Thanks.

  7. THANK YOU for taking the time to share this post! I’m about ready to start my very first pair of pants (the Pietra, btw) and looking for any great advice. “Listening” to your sage advice gives me more confidence going forward. And your pants did turn out so beautifully!

  8. This post was wonderfully detailed. I followed your process step by step and my concealed zipper went in like a dream — thank you so much!!

  9. Just bought the pattern – gorgeous tutorial on the zipper – and a great fabric. That binding is divine! Thanks for a brilliant tutorial, and fitting pics!

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