Mark B-D on fold = Sleeve length +½” (Shaded portion is 1” for in turn for plain sleeve.)
D-C =1/12 Th chest+½”
Draw perpendiculars from D, C, and B
D-E =¼ chest -1”
B-J=sleeve round + ½”
Join D-F and F-J
Divide D-F into four equal parts by points G,H and I. Draw perpendiculars from those points such that
G-K= ¼”, H-L=½” and I-M=¼”
Join the points F-K-H-M-D by a curved line as shown in the figure. This is the front portion of the sleeve.
Join the points F-L-D -by a curved line as shown in the figure. This is the back portion of the sleeve.
Cut the paper draft along the line B-J-F-L-M-D. Open the fold .and cut along the curved line F-K-H-M-D.
This is the draft of basic plain sleeve. Outline of the draft is traced on a fairly thick card board and a block is prepared which can be used as foundation for all other types of sleeves.