Now we are going to see second sleeve.
My measurement for full lenght is 16.
Now mark b/8 - 1 is 10 cm, then change the inch tape , and mark b/4 - b/15 is 16.5 cm
Now match this with b/8 - 1 is 10 cm and mark a line as shown in the picture. Now draw a line completely as shown in the video.
My size is 14cm , mark and draw for your size and join the corners. Now mark a centre point in this line(see video) and top and bottom take 3 cm and join the lines as shown in the video.
Now cut the measurement carefully.
It is a Folded one. cut as shown in the video.
You will get a good blouse when you follow this measurement method.