Kwik Sew 3300

This is such a pretty style. Here is my Kwik Sew 3300:


I think it looks so pretty with the black and white theme. The lace was a gift, and the floral stretch lace is from a local fabric store. All other material supplies are from Bra Makers Supply.

It’s pretty, but there were a couple of fitting issues. One really wasn’t a biggie. This bra  had the straps pinned up about 2 inches here in the picture – so I shortened those.

The bigger fitting issue is the upper part of the cup is loose. I could pinch a quarter-inch out of the upper cup. That shouldn’t be too hard to fix on the pattern, and thankfully it doesn’t show when I wear it. This style actually fits similarly to how a foam cup bra fits.


You can see here where I pinned the cup.

The steps I took beforehand really helped me to get the cup to fit properly. Here’s what I did for this bra (and some of this is from  past posts, but I’m putting it all together here):

The first thing I did was sew up a muslin for the cups. I did this twice. After looking at the pattern pieces, and picking the one I thought was closest to my size, I sewed up my first muslin. I used some scrap cotton I had left over from a skirt muslin I’d made. On this first one I could see how much I would need to adjust the pattern along the wire line. Remember, I my wear one size bra for the cups, but my wire size does not match that – it’s quite a bit smaller. So that was my first adjustment.

After I altered the pattern I sewed up another cup muslin. Again, I used some left over cotton, but this time it was from one of my moulages. This second one I pinned over an existing well-fitting bra. It was a pretty good fit at this point. But still needed a bit of adjustment. On this second muslin I drew where the seam lines fell underneath it.  Again, dealing with an Omega shape means most patterns don’t fit the way they are.


At this point I was pretty sure I had the right size and shape for me. And I was really close.

This bra has a vertical seam, so no upper and lower cup, but instead and inside and outside cup. I was using lace for both the inside and outside cups, so I lined them both with sheer cup lining. That made both cups completely non-stretch to give it the support it needed. I’ve done this before on all lace bras, and it works great. I usually don’t use Lycra because I don’t find it offers the support needed, but using this sheer cup lining would be a great option for under Lycra too.

At this point I was feeling quite confident that this bra was going to fit without any issues. You see, most of my issues have been the bridge and the adjustments I needed for the Omega shape. I haven’t run into this looseness before.

I didn’t use the band that came with the pattern. I used the one I know fits wells. I now have a custom bridge that is working great for me and I wasn’t going to mess with that. As well, I drafted the cradle on my band to fit a Vertical wire and a custom bridge. After all the work to get the band to fit so well, there was no way I was going to try another band! All I was really wanted was to insert the 3300 cups into my band for a different look.

Even though this bra pattern still needs some tweaking, the steps I took ahead of time really were worth all the effort. And if you have challenges with fitting, I really recommend this method of fitting the bra cups. A shout out to Sigrid for sharing this. And after much searching, I realized it was not in her blog, but on Pattern Review. She explained this when she reviewed Merckwaerdigh’s BHST2 pattern. Really a great tip!

Happy Creating!

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5 thoughts on “Kwik Sew 3300

  1. Well done. Such a pretty bra & interesting process. Thanks for all the details and link to Sigrids tutorial. This method of cup fitting should save loads of time and precious supplies. Can’t wait to try BHST2. What a pretty pattern. Thanks for such an informative bra making post. You’re an inspiration to us all.

  2. Thank you, Naomi! Some of the learning I’ve experienced didn’t come easily, so if I can help someone else to learn a little more easily – that would be wonderful! Oooh, the BHST… I agree it is such a pretty pattern.

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