How To Sew a Circular Bottom Neatly…….

Round bottom is a nice feature not only for bag bottom but also for a cylindrical pouches and bags. Here is how!

Step 1. Make a card board template for a half circle. Make sure that you do this very neatly. Fold the fabric in half, secure it with pins. Draw the half circle with the fold as the diameter.




Step 2. Cut the half circle along the line you have just drawn. Open it flat. Divide the circle in 8 place makings. There will be eight markings equidistant to each other at the rim of the circule (see picture).



Step 3. The with of the fabric for the side part is determined by the circumference formula. Make sure that the diameter d, is the actual diameter of the template circle minus 2cm (1cm seam allowance). You would most likely to get a value with lots of decimal places, so to make your life simple round the number to the nearest whole or 1 decimal number. When you know the circumference add 2cm for the seams (1cm seam allowance again). You would then cut one sheet of fabric with the width calculated and height of your preference.

Step 4. Sew the seams and fold the piece in 8 equal parts and mark the position. You should now have 8 markings (including one sewn section) equidistant to each other.




Step 5. Match the markings on the circle and the side parts and secure it with pins or clips.





Step 6. Sew the edges around the circle. Make small notches on the side panel fabric to ensure the markings are kept matched as the fabric would feel stretched.




Step 7. Cut the seam off to 5mm.






Step 8. For pouches that are going to be used for the exterior part, once the work is turned right side iron the sewn edges in few sections. All you need to do is to gently place the edge of the steam iron for 1-2 seconds to tidy it.




Here is what I made earlier!

Responses to “How To Sew a Circular Bottom Neatly…….”

  1. K&S City Girl

    Thanks for the tutorial. I’m currently learning to sew and can only sew straight lines. This tutorial is very usefu.


  2. mia

    I’m gonna have to try this… Looks so simple, but I’m sure it will take some practice for me to get your perfect results!
    I love your tutorials.

  3. Kyoko

    Hello Mary,

    I am so happy that you found my tutorial useful. πŸ™‚ Once you get the circumference and the width of the fabric correct you have done half of your work. Good luck!

  4. Kyoko

    Hey Mia,

    Thank you for your comment! Only when I am tired or rushed I don’t get a really good finish. It is really simple honestly! πŸ˜‰

  5. Judy

    Good tutorial on circular bag bottoms. I found that once the circle was cut out, an easy way to divide it into 8 was to fold it in half, then in half again, and then one more time. If you then pinch the outer edges of the pie-slice that results, you have 8 little equally spaced marks when you open it out. By the way, I bought two of your little key-chain pouches from your Etsy shop and they are great!! I love your fabrics.

  6. Kyoko

    Hey Judy!

    Thank you very much for your comment!! Folding the circle as you explained is exactly what I wanted to say but couldn’t figure out how to say it, so thank you!

  7. Joleo


    please excuse my japanese πŸ™‚ I’ve never dared make anything with a circular bottom so I’ll have to try now.

  8. Kyoko

    Definitely try circular bottom. Once you know how to do it, you can do oval and all the other curved shapes!

  9. Karen

    Wonderful! I know where to come for instructions to extend my limited sewing skills.

  10. Kyoko

    Hello Karen,

    I self-taught a lot of sewing technique. Just over a year ago, I was scared to do a circular sewing. But I realised that it wasn’t as complicated!

  11. two hippos

    What a brilliant tutorial, thanks.

  12. jo

    Found your tutorial through U-handbag. Will have a go at this you make it sound so simple.

  13. Kyoko

    Hi Two Hippos! Thanks for your comment! πŸ˜€

  14. Kyoko

    Hi Jo!
    The very first time I did a circular bottom, I was really scared. But as long as you get the following three pionts right; 1) get a good circle, 2) mark evenly (comment by judy is very helpful) and 3) get the side panel measurement correctly, then it should go smoothly! Good luck!

  15. oge


    This is real neat.I have a bag design in mind and will definitely be trying the round bag bottom for that design.
    Hopefully will show it off when its done

    Thanks. You have been bookmarked:-)


  16. machen & tun

    Thank you so much for the tut!! I always wanted to try that, with your perfect guidance now I did: it came out ok and now I can work on it πŸ™‚ Btw I found a great site to find out my measurements, it may be helpful for others:
    (Sorry I donΒ΄t know how to link..)
    It is a german site but very easy to use: just scroll down to “Rechner fuer Kreise”, type in the measures you know and you will get the rest. Very efficient :-), thanks to Arndt Bruenner and thanks to Kyoko!! Claudia

  17. crafty

    Thank you for these step-by-step explanations ! Very useful. They make the tricky art of sewing circles look easier !
    The round-bottom bag looks great too !

  18. Eva Mari

    Thank you SO very much for this wonderful tut!
    My grandkids wanted sailo’s bags for their swimwear and as a novice in sewing I dreaded this task…
    Best regards Eva Mari πŸ˜€

  19. Barbara

    just curious how much did you sell these bags for on etsy? They are beautiful!!

  20. Great tutorial! Thanks!
    I find it difficult to sew seams that are not straight lines>< any tips?

    • kyoko

      Hi Joanna,
      Whenever I sew curved lines, I put enough pins so that the position is secure. If it’s really curved, then I add few notches so that the fabric won’t stretch too much.
      Hope this helps! So glad that you enjoyed the tutorial πŸ˜€

      • You know how the machine sew seams in a straight line – as in the machine will drag the fabric in a straight line as it stitches.. sorry i am very bad at explaining…

        when i try sewing curves, my machine doesn’t want to, it just keeps dragging the fabric in a straight line and refuse to turn!

      • kyoko

        I know what you mean! Whenever I sew along a curved line, I do it very slowly (almost like few stitches at a time – sometimes a stitch at a time!). I also lift the pressor foot to turn around.
        Hope this makes sense πŸ˜‰

  21. Jo

    hey look, you helped me a great deal. i had other ways to come up to the same but triple complicated. so God bless you for your skills shared.

  22. shirin

    Thank you very much for this tutorial. It was a great help.

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