Is warm, comfortable and cute, and is super easy and fast to make.
Step 1: WHAT YOU NEED
-long piece of fabric (stretchy and soft, IMPORTANT);
Step 2: CUT
A→ the measurement of the circumference of the open part of the sleeve;
B→ the measurement of the circumference of the shoulder part;
C→ the measurement of 1 1/2 the circumference of your chest;
D→ the length of the sleeve.
This is the measurement I used (but you really should resize them on your own body measurement):
Remember to do it a bit larger to be able to fit a sweater under it.
Also it should not be too long or it will fell down, or too short or it will be uncomfortable.
Step 3: SEW
Leave the rest open.
It may take a little bit before you have the right and comfortable measurement, so try it on before sew it.