How To Sew A Mason Jar Cozy | Free Sewing Pattern
Many people use mason jars as glasses for hot and cold drinks. But they can become a little slippery when they get a bit of condensation on them, and hot to hold when using them for coffee or tea.
So a mason jar cozy is a perfect accessory.
This cozy has a flat bottom, so it not only protects your hands from heat, cold, and condensation, but also protects a table’s surface.
There are many styles and sizes of mason jars. This one is designed to fit a mason jar that is:
- 3-1/4″ diameter
- 10-1/2″ circumference
This is a beginner-friendly sewing project.
Pattern notes
- I used 1 layer of thermal batting. If you want to add a layer of cotton batting to ensure the condensation is absorbed by the batting, you may want to reduce the seam allowance from 1/2″ to 3/8″ or 1/4″, depending on how snug/loose you want your cozy to be. Layer the batting so the cotton batting will be closest to the jar, and the thermal batting will be closest to the hand.
- With the 1 layer of thermal batting and using a 1/2″ seam allowance, this cozy fits snug around the jar, so it won’t slip off, but isn’t difficult to get on. If you want a looser fit (or are adding another layer of batting), you can reduce the seam allowance to 3/8″.
Materials
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- Fabric for outer layer and lining
- Thermal batting (Insul-Bright or something similar)
- Cotton batting (optional; may want to add to absorb condensation from cold drinks)
- Thread
Tools
- Sewing machine
- Walking foot (this makes sewing with thicker materials, like batting, easier. This is the universal one I purchased for my Baby Lock, which is a different machine than what’s shown in the photos)
- Temporary fabric pen or chalk
- Temporary fabric adhesive
- Ruler
- Iron
- Scissors
- Pins or clips
Free sewing pattern for a mason jar cozy
Steps to sew a mason jar cozy
Step 1
Download the free printable sewing pattern, print it, and cut it out.
Fold your fabric in half, then place the one side of the pattern piece (“cut on fold”) on that fold.
If you plan to add several quilting stitches, you may want to cut your fabrics slightly larger, add the quilting stitches, then cut according to the pattern piece.
You will need to cut the pattern piece in:
- Outer fabric
- Lining fabric
- Thermal batting
Step 2
Start by trimming the batting. The top of each panel of the batting should be 3/8″ shorter than the fabric to reduce bulk, as it’s harder to trim the batting’s top seam allowance after side seams are sewn.
Place the outer fabric and thermal batting together.
Add quilting stitches (in any pattern you like) to secure the layers together, or use temporary adhesive to hold them together while you sew the side seams.
Step 3
Fold your cozy in half so the center fold is at a 45-degree angle, and the two edges that are next to each other meet. Sew the two sides together using a 1/2″ seam allowance.
Repeat to sew the other 3 sides together.
Repeat these steps for the lining; however, I increase my seam allowance just slightly to account for the bulk of the batting and to ensure the lining will fit smoothly inside the cozy without wrinkling.
I only increased my seam allowance by about 1/16″, so right in between 1/2″ and 5/8″ mark, and the lining fit perfectly. If you’re using thermal batting and cotton batting, you may want to increase your lining’s seam allowance by 1/8″.
Step 4
Trim the batting’s seam allowance.
Snip at the bottom of the seam up to the stitching so you can open the batting.
Then cut the batting back on either side of the seam to reduce bulk.
Quickly press the seams of your outer and lining piece.
I like to alternate which way I press the seam so when the lining and outer cozy go together, one seam folds to the left and the other to the right, which will reduce bulk.
Step 5
Turn the outer piece right side out and fit it into the lining.
Line up the seams and clip together so the lining and outer fabric’s seam allowances fold in opposite directions to each other.
Use a temporary fabric pen to mark two lines for your opening. I left an opening just within two side seams, which makes it tight to turn the cozy right side out, but is big enough to do so…you just have to take your time.
I do sew between these two lines; however, I use a basting stitch (longest stitch length) and backstitch at the start and end. This ensures my seam will line up perfectly and I can press the seam open and get an accurate seam allowance.
Press the seam open where the opening is.
Then use a seam ripper to remove your basting stitches.
Turn the cozy right side out through the opening. Take your time with this step so you don’t rip open the seam.
Press the top seam.
Top stitch around the top opening, about 1/8″ away from the edge. You may find it helpful to move your needle position to the left to make it easier to sew around the opening.
Your mason jar cozy is complete!
