Clothes sewing Tutorial Becky  

Ending Bum Crack One Pant At A Time

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Having the trend of low rider pants is fine, but it does start to pose a problem in the back.  How do you close that gap down that loves to show off your panties or unmentionables?  Learn a quick trick to adding a hidden elastic in the waist- just on the back side- to pull it all in and close the peep show! NO more bum crack! Easy to do.

learn how to fix your pants so bum crack isn't showing. Great clothes hack and simple to do! No fancy supplies.

How to fix pants with a gab in the back

This tutorial is to help those who have girls showing their bum cracks. You will be shown how to insert an elastic band inside the waist band of jeans/pants to close that space down!  You don’t need any fancy supplies….just elastic, sewing machine, scissors.  There is elastic out there with button holes already in place if you are looking at making the pant waist adjustable.

You need:

1 pair of pants that just don’t fit, show off your bums, or are sticking 2″ off of your back.
*If there are any labels sewn to the waist that would block the elastic i just snip the stitching and take those off.

1″ elastic band 16″ long (you will be cutting this to size later)

Super Sharp Scissors


Instructions for fixing your pants:

You will be making slits on EACH SIDE of the waist for the elastic.

Holding the waist with both hands at the sides, pull apart the band. Snip the inside of the waist —DON’T cut through to the other side!!! ONLY cut the inside. Make a VERTICLE cut 1 1/4″ long.

Repeat this for the left and right sides of the waist.

fix bum crack in pantsfix the gap in the back on your pants

Measure the area between the cut slits. Then subtract 2″ from that number. CUT the elastic to this measurement.

You have a choice to make—-do you want to put a button on so it will adjust or no button?

If you are doing a button continue on. If you are not skip this step.

Adjustable elastic with button:

Make button holes at ONE end of the elastic. I do 2 or 3. After stitching them snip the inside so the button can go through it.

Sew a button to 1″ past the slit on ONE side. Make sure this is larger than the button holes as the elastic stretches just a bit.

sew the button or make it adjustable! Fix those waist gaps on your pants!

Fold over the edge with button holes and put a large safety pin through it. Thread this through the slit on the opposite side of the button. STOP when the end is just poking out of the slit.

how to do alterations for bum crack pantsadd hidden elastic to pants tutorial

Use a zigzag stitch and stitch this down. Go over it at least twice to make sure it won’t ever move. Use a darker thread or coordinating one. You may also pull the elastic inside and stitch it down so it is invisible.

alterations for your pants

Keep feeding the elastic until it comes out the other side. Give it a good pull. Remove the safety pin, making sure you don’t let the elastic jump back into the hole. Button the elastic to the pants.

*If you didn’t make the elastic adjustable with the button holes then you need to sew it in place. You might want the wearer try it on to determine the best location. You can leave the elastic a little long and snip the stitches to adjust it later if needed.

alterations on pantshidden elastic in pants tutorial

This is what they should look like when the elastic is evenly stretched out. If you would like to keep the elastic from twisting you can sew a line down the center in the back.

end bum crack tutorial

no more bum crack. Quick fix for closing the gap in your pants.

Need some supplies?

Like this tutorial on fixing your pants? You will love  fix your short pants with a real hem, turn an old sweater into a cardigan,   30 easy skirts for girls.

High Water Pants to Shorts Tutorial

high water pants to shorts tutorial patchwork possse


84 thoughts on “Ending Bum Crack One Pant At A Time

  1. Julie

    Okay, so I’m just going to Old Navy or the Gap–I am way to LAZY!!! Those pants do work though. Have a good one.

  2. Carin

    GREAT idea!!!

  3. Bridget

    I have a skinny minnie who’s in desperate need of this tutorial! I try to buy her only adjustable waist pants but some are just too cute to pass up, know I can fix them myself. Thanks!

  4. 2paw

    I was just talking about doing this today at The Knitting Coven!! It’s a great idea, though I like to button hole stitch around the 2 openings to stop fraying!! Nice modelling!!!

  5. CrimsonBruin

    Yippee! This is just what I need. Thank you!

  6. Jenna

    Very cool idea. I have a half a dozen “brothers” who are going to find their pants very much altered next weekend when I go to visit them.

    Now… the next step, what do you have to solve the underware baring baggy pant issue?

  7. Becky

    This is the best, most practical tutorial I have ever seen. Thank you thank you thank you for the inspired idea!!!

  8. micki

    Best. Tutorial. Ever!

  9. wyndesnow

    Thank you for sharing. I have 3 boys and although we do try and buy the pants with the adjustable waist band, sometimes they are just not available. This is a great way to fix that!!!!

  10. Amy

    Love this–I seriously have the gapping problem and thought I would never again find pants that fit! Thanks!

  11. Heather

    YOU ARE Brilliant!!! Thanks! I get hand me downs and such that do not have the adj. waist and I have tall slim kids. I LOVE THIS!

  12. CalicoDaisy

    Oh, my goodness, this has to be the best and most-needed tutorial yet. I consider it a personal mission to lecture all those young ladies who have hiney exposure! My daughter is quite mortified with me, but I am compelled to explain the importance of nice-fitting pants to all. I will have to make copies of this tutorial and carry them with me for visuals on proper pant wearing! — Michele

  13. Frau Traumberg

    Wow! Simple and usefull! Love this, thanks!

    Greetings from germany,


  14. margaret k.

    Brilliant. Just brilliant.

    Thanks for sharing.

  15. Christy Sews

    Just brilliant! Thank you for sharing.

  16. WendysWTN

    I could see this working great on my toddlers pants, too! Thanks for sharing.

  17. Stephanie

    Great idea and I LOVED your title. ๐Ÿ™‚

  18. CalicoDaisy

    I want to post about your tutorial on my blog. Can I use your panty-exposing picture? — Michele

  19. CalicoDaisy

    I don’t see your e-mail, so I have to contact you here again. Come over to my place and see my posting. Thanks for letting me put up your photos.– Michele

  20. Lilia

    I had to do this exact thing for my daughter. I just bought buttonhole elastic and eliminated having to make the buttonhole myself. Laziness. Thanks for the tute!

  21. artsyfran

    Oh, this is fabulous! Thanks so much for sharing it. I know what I’m going to be doing this week!

  22. AndreaLea

    You are awesome!! I have a stack of pants that I’ve been planning to adjust. And you’ve gone and done all the thinking for me!

  23. Barbara

    What a great tutorial. My daughter and I both need this so badly. I was just today thinking of putting darts in her jeans but this idea is so much better. Thanks

  24. Jess

    No more builders crack, slot machine, eftpos… hehehe i sooooo needed this, what a fantastic idea, so simple!

  25. Beth Workman

    Thank you! After years of living with gapitis or passing up otherwise great pants, I have a solution. Why didn’t I think of this? I’m so glad you did. I just tried it on a my favorite jeans and have been dancing around the house. Go hips, go!

  26. Anne Weaver

    Brilliant!! There's nothing I hate more than a gaping waistband!

    I scheduled a post on Craft Gossip about your tutorial, scheduled to go live tomorrow:

  27. Galit

    That is great, especially for those of us with rounder booties! This happens to me all the time. Thanks for the tutorial

  28. ks sunflower

    Fantastic solution! Many thanks!

  29. Chacoy@Ma21cuteboy

    Thanks for sharing;}

  30. whosies

    it is a smart way to fix something sooo obnoxious!

  31. whosies

    thanks for stopping by! give it a try…it totally works too!

  32. whosies

    darn those round booties!! ๐Ÿ™‚

  33. whosies

    it is a smart way to fix something sooo obnoxious!

  34. whosies

    thanks for stopping by! give it a try…it totally works too!

  35. whosies

    darn those round booties!! ๐Ÿ™‚

  36. jrb

    Becky – I can not say thank you enough for this fantastic tutorial. I am curvy and have never had a pair of jeans fit just right. I’ve had it bookmarked for a while and finally got around to giving it a try. Amazing! You are brilliant!

  37. posse boss

    I am so glad it works for you. nothing is more frustrating then having nothing that will work! glad that we are crafty woman who can figure things out for ourselves when the big stores can’t. enjoy.

  38. M.L.

    I LOVE this idea – thank you (I have been making do with an elastic belt and I KNOW this would feel way more comfy and not slip the way the belt often does – also adore the adjustable button hole idea – plan to use the elastic they sell for maternity wear in case I fill out *grin*)

    Great pictures too – detailed and helpful.


  39. C.J.P.

    Thank you *SO* much for posting this. I bought new jeans today that fit everywhere except the waist… and now they fit there too! This is now the best fitting pair of jeans that I have worn in over 20 years. Thank you, thank you, thank you!

  40. Lois

    I am going to the store right away and buying buttonhole elastic so I can do this with some of mine and my daughter’s pants!

  41. posse boss

    yay! you go girl!

  42. Cheryl

    I ALWAYS have this problem! Thanks for a practical solution that’s easy to do!!!

  43. joyce

    Sometimes I wonder why I never thought of that! Thanks so much. I have always had a gap problem because I have a waist and then i have a bum, so always a gap no matter the make of jean. NOW! yay!

  44. Sarah S.

    To sweet Julie (1st comment) who said,”Okay, so Iรขโ‚ฌโ„ขm just going to Old Navy or the Gapรขโ‚ฌโ€œI am way too LAZY!”… well, God love her… she must have an incredible bod that fits into pants from Old Navy and The Gap. I bought some denim shorts today thinking: I am SO glad I pinned that tutorial about how to fix that gap in the back of pants. Yep, round booty, huge legs, small waist, BIG gap at the waist. Now I can actually buy pants off the rack and in an hour (or less) alter all that I bought at one time! Thank you SO much!

  45. posse boss

    that’s funny. i think it plagues us all! hope it works for you!

  46. posse boss

    yay sarah! glad you found a solution. works great. ๐Ÿ™‚

  47. Sarah S.

    Okay — finally about to try. Do you hand stitch every thing? Button in, and your elastic down? That’s a LOT of hand stitching through denim (OUCH)… but I’m not sure my machine will go through the waist band of jeans. Hmmm. Okay… so maybe 2 hours.

  48. posse boss

    i used my machine. so much easier! that would take a lot of time and it would kill your fingers!

  49. Allison

    THANK YOU! I can’t tell you how many pants I’ve ruined by trying to alter them without knowing what the heck I was doing. I’m off to try you technique now! ๐Ÿ™‚

  50. posse boss

    you betcha allison! i still use this method and it is super easy to adjust when another child jumps into that size. Good luck!

  51. Bettie

    If you are going to use a sewing machine, just open up the stitching where the waistband is sewn down, then thread the elastic through with a large safety pin. Pin the elastic down with a straight pin and stitch it in place. Pull elastic to the other side, pin it in place, try on pants to fit, adjust elastic as needed, sew in place and stitch up the places in waistband opened to allow the elastic through. I wouldn’t recommend cutting the fabric as in time, it can ravel out and you have lost a good pair of pants!

  52. Selena

    Thank you so much, I love my daughters pant that have this going on as she is tall and thin and so many of her pants just fall off if the company hasn’t done this, but I never thought of doing this myself. I have a lot of pants to fix now (both my daughters and my own). Thank you again, keeping a belt on a 3 yr old just hasn’t been working.

  53. posse boss

    so much easier to put the belt in the waist band! lol good luck with all the adjustments. fun stuff!

  54. posse boss

    great idea to do it in the seam! plus that would equal out the waddidge of the waistband too. the hole does ravel a bit, but because it is in the inside it isn’t too big of an issue.

  55. Sharla

    Thank you so much for this tutorial! I know it was published a few years ago but I just found it via Pinterest. At 29, I had all but given up wearing jeans because of this. I never even thought of doing this – can’t wait to try!

  56. Gina

    Isn’t this the greatest??!!! I have been doing this since the kids adjustable waist pants came out like 10 years ago. My kids are really thin & for a long time pants didn’t come in a slim version. The adjustable waist ones are not always in the styles we like or are marked up past what is really reasonable. So I have been making our own.

  57. posse boss

    i totally still do this! it comes in sooo handy.

  58. sandy

    I will be doing this

  59. Katie B

    I can’t believe I never thought to do this myself! I love adjustable waistbands in kids pants–I never thought to put them in the ones that don’t have that! And for my own pants?? genius.
    Thanks for putting this up! (found you via Pinterest!)

  60. posse boss

    thanks katie– i love that it is for everyone! works every time too. ๐Ÿ™‚

  61. Cis Farney

    Thanks for this great suggestion. Now my comfy jeans will be even more comfy since I won’t have to wear a belt with them! ๐Ÿ™‚

  62. Nancy

    Great idea. I had the same problem with my girls when they were growing up. I use to make darts in between the belt loops in the back (two). I had them try on the pants inside out and pin them so I knew how much to take in. If their were no belt loops I just made two on the back. They looked really professional and they fit perfect. Love your idea too!

  63. whosies

    adding darts is what i started off with, but the bulk would give them creases on their little bums. this method worked a little better because the gather is spread over the whole back and not concentrated in one spot.

  64. Elora

    I have a hard to fit body (5 ft 8in 118 lbs) so I constantly have this gap! I am so trying this!!

  65. whosies

    yay elora! you totally should! good luck-

  66. Edilaine

    Thanks a lot for this tutorial, I`ve just tried it, and worked!

  67. whosies

    edilaine– i love that it worked for you! thanks for letting me know! congrats too!

  68. dashia

    i need to do this to all of my lil sisters pants.

  69. Deb

    I don’t understand where you make the button hole in the pants to connect the button on the elastic. I hope you can clear this up for me. Thank you.

  70. whosies

    the button hole is on the elastic. the button is just outside of the channel that the elastic is in. hope that clears it up. ๐Ÿ™‚

  71. Amy

    Thank you so very much! I haven’t had a pair of pants fit in so long! This is the BEST!

  72. whosies

    amy- you are so welcome. hope it works for you!

  73. Karen

    Thank you so much for this. I have 4 small kids and sit on the floor alot. I just feel like I am pulling my shirt down constantly to hide the gap. I am going to do this today! Now if I can just get my friends to let me do it for their jeans. LOL

  74. whosies

    you go karen! go fix all the pants! I totally understand. ๐Ÿ™‚

  75. Janis Spear

    This is absolutely brilliant. I am immediately going to go do this to all my jeans. Thanks for sharing. xx

  76. Lee Ann

    This is so great! My daughters and I all have waists smaller than our bums so every pair of pants gap in the back. Unfortunately, I don’t sew. ๐Ÿ™

  77. Jess

    Haha…great idea!! ๐Ÿ™‚

    Thanks for joining the Link Up!

  78. HeatherM

    Thank you! I finally did this with a pair of my shorts today. Worked great! ๐Ÿ™‚

  79. Becky

    Yay heather! Thanks for stopping back by and letting me know.

  80. Michele R

    I have battled with the gap in the waistband of jeans all my life!! Thank you so so so much!! This worked perfectly.

  81. Becky

    so glad to hear! I love this and still use it too.

  82. Kathy

    If you buy buttonhole elastic……makes it a lot easier!

  83. barb macaskill

    My 4 year old granddaughter is always being told “Say no to crack” because her butt crack is always showing. NOw we can retire that old and tired saying and stop wasting time pulling her pants up a million times a day! THANK YOU for the amazing tutorial!

  84. shirley rae

    i have done this with my jeans as they dip forward and r quite uncomfortable

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