If you do decide to use a larger blanket, you may need to cut it down.

To find the circumference for the circle: measure the base of your neck, then add 1 inch (2. 54 centimeters). [1] X Research source

The sewing pins will mark the placement for the belt holes, so that you can close the coat.

You will be slipping a belt through these slits. If the belt you want to use is wider than 1 inch (2. 54 centimeters), then cut the slit longer.

Consider using one of these strips as a belt for your coat. If the strip is too wide, you can cut down lengthwise.

The back piece will hang loosely against your back. The front will be gathered and scrunched up. If you are using one of the strips you cut off earlier as a belt, simply tie it in a loose knot or bow.

The color can match your blanket, or it can contrast it. You can also use ribbon for this, if you’d like something fancier. Consider folding the ribbon in half, and then ironing it. This will create a crease, similar to what bias tapes have.

Be sure to backstitch at the start and end of your sewing. This will keep the stitching from unraveling.

If you don’t have a jacket, you can use a loose-fitting sweatshirt or T-shirt instead.

You can also place the pieces of a coat pattern onto the blanket and cut those out. Then, follow the sewing directions on the pattern to assemble the coat. [3] X Expert Source Mia DanilowiczMaster Tailor Expert Interview. 8 January 2021.

Measure your other sleeve against the one you just cut. This will ensure that both sleeves are the same length.

Remember, the finished sleeve needs to be ½-inch (1. 27-centimeters) wider, to allow for seam allowances. Consider tapering the sleeves slightly towards the “cuff” for a more tailored look.

If the arm hole is too big, position the sleeve so that the excess fabric is at the bottom. Next, use a needle and thread to close up the hole. Tie the thread off and snip off any excess. If the sleeve is too big, position the sleeve so that the excess fabric is at top. Use a needle and thread to gather the excess fabric until it fits in the sleeve hole. Tie the thread off when you are done, and pin the sleeve in place.