Tutorial — Mitered Corners

Posted on April 3rd, by Amy in Tutorial. 46 comments

Start with a small mitered corner application to gain confidence in making excellent mitered corners every time!

To start gather notions and fabric scraps to practice :


My square measures 8 1/2 inches, and the 4 strips are 1 1/2 x 12 inches. Take special note here: when making mitered corners your strip length needs to be much longer than your square, the wider your strip, the more length you need. Usually I add the strip width times two, plus an extra inch or two, for peace of mind. When I was doing this the first time on my tree skirt, I ended up making my first round of border half the width to accommodate the miter — it wasn’t long enough for the width.

On with the instructions:


pin your strips, center on your square, on opposite sides


Sew with 1/4″ seam — I don’t reinforce my seams at all, it may be helpful to pull out a few stitches when setting the miter.


I press open here to cut down on bulk


pin and sew opposite sides borders to the square


Press open again


Fold your square on the diagonal, this works for rectangles too, but you would need to do one corner at a time.


Match up your seams, making sure that the corner is lying flat without excess, and pin


This is how I pin, you don’t want the seams to move, and you need your tails to be secure as well


You can do both corners at once, just flip it over for the opposite corner


Next line up your ruler on the diagonal, and mark the sewing line on the tail, like so —


And sew on the line that you drew


Open up your square to check your corner


If you are pleased, trim to 1/4″ seam allowance, and press, if it’s not quite right just pull out your stitches and try again. Take your time lining things up :)

Now go back and fold in the opposite diagonal and repeat


I like to trim up the extended seam allowances


You should have 4 of these!

Mitered Corner Tutorial

So far I’ve used this technique for my tree skirt, and a few swap blocks. I envision throw pillows on the couch as the perfect project for mitered corners. Maybe that will be next :)

I think that’s everything! Let me know if you have any questions and I will do my best to answer them :) Have a great weekend!


ETA 5/20/2015

This post is six years old and still relevant to many of you! If you are looking for more instruction, I recently made a video with Interweave. Along with Mitered Corners, there’s tons of info on basic quiltmaking skills, and timesaving tips. Check out the DVD or downloadable video HERE.

46 thoughts on “Tutorial — Mitered Corners

  1. 1
    Stephanie says:

    Thanks Amy. I’ll bookmark it and perhaps I’ll actually do mitered corners sometime. I have done them in the past…many years ago…with great frustration! I shall not give up.

  2. 2
    Erin says:

    Thanks for the tutorial! I was kind of envisioning this was the way you made them, but this makes it so much clearer! : )

  3. 3
    jacquie says:

    thanks amy…i’m going to try this for sure…i’ve mitered a few borders, but i like your method better.

  4. 4
    Michaela says:

    Thank you so much for this tutorial. I thought I knew how to do it, but I didn’t.Thanks

  5. 5
    Sarah Pead says:

    This is a great tutorial. It will definitely go into my bookmarks so I can use it as a reference in the future. :)

  6. 6
    amylouwho says:

    awesome! I really want to try this on the sashing for my bird quilt! Thank you so much!

  7. 7
    Jackie says:

    Great tutorial! There are so many ways to miter and I love your way. I will have to try this one, it makes a lot of sense. Thanks!

  8. 8
    Sherri says:

    This is a terrific tutorial…I’ve already bookmarked it! My grandmother showed me this method many years ago…but I had forgotten the specifics…so thank you!

  9. 9
    SaraRules says:

    Fabulous! Thanks for the awesome tutorial! I’ve always been intimidated by mitered corners, but you make it look so easy!

  10. 10
    Amy says:

    What excellent work Amy. Thank you. The pictures really explain what you’re doing.

  11. 11
    Fiona says:

    Excellent tutorial Amy – Thanks for taking the time – You make it look so easy :) I am going to try it very soon

  12. 12
    sewtakeahike says:

    OMG Amy! I’ve never seen mitered corners done this way but now I certainly have to try it! Thank-you for this tut!! I’m seriously excited about your mitered corners!

  13. 13
    em's scrapbag says:

    Thanks I have always wanted to learn how to do that. I have bookmarked it. I look forward to giving it a try.

  14. 14
    Tipper says:

    A great tutorial Amy!! Almost makes me think even I could do it :)

  15. 15
    audreypawdrey says:

    Thanks for the tutorial! I am going to have to try this. I have always wondered how to go about doing it.

  16. 16
    Fulvia Luciano, artist says:

    I have never seen this explained so clearly; on top of that, you did a great job with the step-by-step photos and instructions. Congratulations!

  17. 17
    Anonymous says:

    Fabulous, Babe!!! great photography; I think I could actually follow your directions if my head was tracking properly…it’s full of oil painting right now and EASTER!!!!Love, hugs and kisses, Mom

  18. 18
    Artfulife says:

    What a great tutorial! Thanks for sharing.

  19. 19
    another amy says:

    Great job with the tutorial, Amy. I love the look of mitred corners, but I’m always scared to try. :) You have given me confidence.

  20. 20
    sheppy says:

    brilliant explanation, I was wondering how to do that (and what it was called)!

    Thank you

  21. 21
    Joan says:

    Thanks for the great tutorial. That sure is so much easier than the way I have been doing mitered corners!
    Have a nice day!

  22. 22
    Niesz Vintage Home says:

    Wow! Great tutorial.
    Thanks so much for the easy step-by-step instructions!

    Kimberly :)

  23. 23
    Rebekah says:

    thanks for posting this! This is definitely one tutorial that I’ve never mastered :)

  24. 24
    Marrdy says:

    When I try this I will have to print this out and follow step by step.

  25. 25
    Millie says:

    Thanks Amy for a great tutorial…will have to give it a try.

  26. 26
    Ella since Osix says:

    Oh.. tanks so much for sharing.

  27. 27
    Anonymous says:

    Thank you so much. I am making a quilt for a baby shower gift. And I want it to look extra nice. The pictures really help.

  28. 28
    TJ and Whitnee says:

    I don't ever miter my corners because I've never really known how! So thanks for this tutorial! I hope you don't mind if I share a link to this tutorial on sewwhattoday.blogspot.com on March 4!

  29. 29
    ByTheSea says:

    Thank you so much…. awesome.

  30. 30
    theodora says:

    very nice and easy to follow.

  31. 31
    pinksuedeshoe says:

    That is brilliant, thank you so much. This is like a gillion times easier than the last mitered corner project I did. Thank you thank you!

  32. 32
    Mary says:

    I totally think I can do this! Thanks so much!

  33. 33
    Sharon says:

    I love the tutorial on mitered corners. Will give it try and let you know how it comes out. Thanks for the tutorials.
    Thanks Sharon

  34. 34
    Brenda says:

    This is the easiest way to do mitered corners I have done and I have tried many. I use the formula of “Measure the length of your square plus the width of your boarder doubled”.

  35. 35
    Dina says:

    Great tutorial. I now will conquer the dreaded mitred corner. Your pdf of instructions will not print. Would like to have a print out – easier to follow at the sewing machine. Thank you.

  36. 36
    maria jose de milano says:

    excelente tutorial es muy bueno saber elaborar las costura perfectas por eso aprendo de las mejores, gracias por compartir saludos desde venezuela……..

  37. 37
    Rose says:

    the trouble I have is keeping corners mitered while hemming border. Mitered corners look ‘so’ professional and I have so much trouble with them. I guess they’re so simple ; they’re hard.

  38. 38
    Esther F. says:

    Thank you very much for this great tutorial! I just tried it for the first time and I am very happy with the results!

  39. 39
    Friederike says:

    Many thanks for this great tutorial! Found it on pinterest and it will help me a lot in all my future sewing projects ;-)
    Have a fabulous week!

  40. 40
    Dyan says:

    Thank you very clear great tutorial !

  41. 41
    Gillian says:

    formula for strip lengths is length of side plus 2 x width of strip plus 2x seam allowance. Eg IG block is 6″ and strip will be finished width 1 inch (I.e. 1 and 1/4 cut) then length is 6 + 2 + 1/2 = 8 1/2″

  42. 42
    carmen says:

    muchas gracias ,

  43. 43

    that was very clear thanks

  44. 44
    Rosiane says:

    Very nice !!! I’m from Brazil and had learned the cantomitrado in other ways, but your way is great !! I will train. Your works are wonderful !! Congratulations !!!

  45. 45
    Dubbie says:

    Thank you so much for this great tutorial.. I’ve never done miter corners but tonight I tried it and it was so easy.. Found it on Pintrest. Thanks again!

  46. 46
    Lisa Peden says:

    Both my son and my youngest daughter are tall–and sleep on XL Twin beds. Unfortunately, ready-made XL twin sheets are extremely hard to find. When I do find them, they’re ugly or plain. I’ve attempted to make twin XL fitted sheets out of nice fabric–but the sheets have been too short on the sides–or the corners didn’t fit right. After reading this tutorial yesterday, I started to wonder if I could use your method for making mitered corners on my XL Twin fitted sheets. What do you think? Thank you for posting this, btw. I really appreciate it! <3

    Lisa Peden


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