Our challengers are sewing away on their first Super Online Sewing Match II challenge, the Sutton Blouse! Kelli from True Bias was our Grand Prize Winner in the first Super Online Sewing Match, and now she has a thriving business with popular garment patterns for women and children. Kelli’s Sutton Blouse design features side seam slits, a nice detail that can elevate garments from standard to special. Kelli shows you how to create a side seam slit below; follow her lead and the Sutton Blouse will sew up in a breeze!

Find more from Kelli at True Bias, and explore all of her patterns in the True Bias shop. Kelli’s about to debut her new kids’ pattern next week, the Mini Southport Dress. You can also keep up to date on Kelli’s latest via Instagram.

Remember, you can sew along in our Community Match. There are prizes!


Hi everyone! I am so excited to be here today as part of the Super Online Sewing Match. Being a part of the Super Online Sewing Match a couple of years ago was a huge turning point for me personally and for my blog. I had recently had my second child and was looking for a way to find more personal fulfillment and growth. Winning the competition gave me a huge boost of confidence and convinced me to take the next step with my business. Within a couple of weeks I was starting my first class at the Fashion Institute of Technology in NYC and within a year I released my first sewing pattern. I feel so blessed to have been a part of it. Now, it feels like such an honor to have one of my patterns, the Sutton Blouse, as the first pattern in the competition.

One of the more recognizable traits of the Sutton Blouse is it’s high/low side slits. Today I am going to show you how to create a slit on the side seam of any garment, much like the slit on the side seams of the Sutton Blouse.

For our purposes today the back is going to be 2″ longer than the front (you can make the front and back even if you prefer that look), and we are leaving a 1 1/4″ allowance for the hem. The slit after sewing will be 2″ tall from the hem on the front, and 4 inches from the back. Note that these are not the exact measurements of the Sutton blouse pattern as they have been simplified for this tutorial.

Start by making a mark on the wrong side of your fabric for both the front and back pieces where the top of the slit will end. This will be 3 1/4″ up from the bottom on the front and 5 1/4″ up from the bottom on the back. Make this mark 5/8″ in from the edge of your fabric.

Now that you have your markings in place you want to finish both side seams separately. You can do this by either serging, zigzag stitching or pinking the edge.

Next, turn the finished edge towards the wrong side by 1/4″ and press. Stitch at 1/8″.

With right sides together, pin the side seams and stitch at 3/8” seam allowance from the top down to the marking you made. Backstitch securely and press the seam open above the marking.

Now, turn the bottom of your hem towards the wrong side of your fabric by 1/4″ and press.

Take this corner and fold it up the other way (now right sides together) at 1″ and pin. Stitch along the edge for 1″ at 3/8″ seam allowance. Clip the bottom corner within the seam allowance.

Turn the corner right side out and continue to press up the entire hem at 1″. Press and Pin.

Stitch across the entire bottom of your garment at a scant 1″ to secure the hem.

Press the remaining open seam allowance between the marking and hem flat at 3/8”.

Starting at the bottom of the hem, stitch up the back edge of the slit at 1/4” seam allowance, continuing up past the marking by 1/4”. Pivot and stitch across for 1/2” and then pivot and continue down the front edge at 1/4” until you reach the bottom. Backstitch at both ends securely. Give it a good press and you are done.

I hope that you enjoyed the tutorial. I can’t wait to see all of the Sutton Blouse entries come in!


HartsRound One of the Super Online Sewing Match is sponsored by Harts Fabric, an independent fabric store in sunny Santa Cruz, California. Since 1969 they’ve employed the most creative and fabric knowledgeable staff. All of the employees at Harts Fabric are avid crafters, quilters, sewists, knitters and true artists. They are always available to help you with any questions you may have about your sewing project, whether it be helping you calculate yardage or pick out the best fabric for your project; it’s what they love! Harts Fabric employees pride themselves on giving customers the best advice when it comes to sewing. They offer a unique assortment of cottons, eco, fashion, drapery and upholstery fabrics. Be sure to check out their latest fashion fabrics just in from New York! They have amazing rayons, knits, voile and lace.