The deepness for the butterfly sleeve is to be decided between G and E. With this diagram is shown we have 1/4th of depth armhole which is from G to 11. This is 1/4th of the side length which will make 2 1/8th inches. Now cross a line from M to 2, from M to 2 is 12 inches increased direct for the butterfly sleeve outside length. This length can be made in any amount wanted. Now cross a square line down from 2 to 3; this space between 2 and 3 cannot be decided unless the measurement is taken parallely from 12 up to the top line is about 8-1/2 inches. Now take this amount of 8-1/2 inches and measure from 2 to 3 and connect 3 to 12. This completes diagram of butterfly sleeve on the back.
In order to begin the front of the butterfly sleeve, allow from T to 13, 3 inches in order to increase the width of butterfly sleeve in the front and connect 13 to U which is the front shoulder. Now correct from U towards 13 the same length as we have of M to 2 which is 12 inches, and place the same from U to 14. Now measure parallel again from 11 against the top line of front sleeve which is from U to T which will make about 7-1/2 inches and place the same from T to 15. Now Connect 15 to 11 and curve from 15 to 14 which completes the front butterfly sleeve.
