I got a lot of question regarding splitting the yarn. Actually it’s not that difficult. I could split 1 balls of 100 gram (200 meter) in 2 hours. For the normal 50 gram balls yarn (100 meter), I could split within 1 hour.
Anyway, regarding my original plan to change the button, somehow I could not find any suitable bigger button to replace the current button on my sage cardigan. I decided to make the holes a bit smaller so it won’t pop out easily.
Using tapestry needle and a strand of yarn, I sew the round edge of the holes several times. This will also strengthen the holes.
As to stabilize the button, I put scrap clothes folded several times and sew it in the back of the button.