This bento bag tutorial needs to be shared. I use it for bulk shopping, gift wrapping, a lunch box, and even a camera bag. Best of all, it’s simple enough that even a dysfunctional seamstress like myself can whip one up in just about 230 minutes.

Caveat: while you can hand-sew this, it would take significantly longer than 30 minutes. I purchased an open but unused second-hand Brother JX 2517 several months ago and it’s been a huge help in all the bulk bag making and clothing repairs I’d been putting off for ages. If it’s in your budget and would be something you’d use, a sewing machine can be a powerful tool in your zero waste journey!

This bento bag tutorial is really, really simple. For your pattern, all you’ll need is a rectangular piece of fabric exactly three times as long as it is tall. My bento bag pattern was 9 inches by 27 inches which makes a medium-sized bag. Feel free to make the bag as large or small as you’d like – as long as you keep that 3:1 ratio in mind – but I found that this size is very versatile.

NB: when cutting out your fabric, don’t forget seam allowances! I added an extra inch to the length and width so that each side had a 1/2 inch seam allowance – I’ll explain more about that below! So while my bento bag pattern was 9″x27″, I ended up cutting out 10″x28″ so I could make a hem on this bag!

Bento bag tutorial step 1

First, start by hemming the edge of your fabric. Remember that 1/2 inch seam allowance? Now’s the time to use it – fold the edges of your fabric once (1/4 inch) and then over 1/4 inch again. (You’re folding it towards the wrong side of the fabric.) Do this on all four sides and pin to hold in place. Sew around the rectangle at the bottom edge of your fold.

Next, you’ll want to fold your fabric into three even parts which will become A, B, and C. If you have an iron, you can press the parts like that. I just make the two folds, put a heavy book on top, and take a few minutes to make coffee. Then unfold the fabric to its full size.

Make sure your fabric is facing right side up at this point!

Bento bag tutorial step 2

Fold part C over Part B and sew their tops together. Sew as close to the edge of the fabric as you can, making sure to backstitch at the start and finish to make sure the thread holds even when your bento bag is full of stuff!

Bento bag tutorial step 3

Flip the fabric around so that part A is on the right side and the part your just sewed is on the bottom. Fold back part C so that its top edge is not touching any of B’s top edge.

Bento bag tutorial step 4

Fold part A over part B, making sure that part C is still folded out of the way. (The first time I made a bento bag I accidentally stitched part C in with A and B, so be careful before you get going!) Sew the tops of part A and B together, making sure to stay as close to the edge of the fabric as possible. Remember: backstitch at the start and finish to make the bag nice and sturdy.

Additional unpictured step: if you’d like your bag to sit up, sew a diagonal line about an inch above the tip of the two corners that have been stitched together (Part B.) then snip off the extra fabric of the corners for a more box-shaped base.

Bento bag tutorial step 5

Flip the bag inside out so the right side of the fabric is now on the outside. You’ll see the spot where the two handles meet. To reinforce this area, simply sew a few zig-zag stitches up and down. It can look a little messy, but pick a nicely complementing thread color and make it look like you meant it. Do this to both sides.

30-minute bento bag tutorial - Green Indy Blog

And you’re done! If you have any questions about the bento bag tutorial, don’t hesitate to throw them in the comments!


An online resource here to help you break down the complex issue of zero waste into simple, actionable steps.

1 Comment

Celia · December 20, 2017 at 7:15 pm

Cute! I feel like you can never have too many bags like these.

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